Updated 1 h ago

Vulnerability database

Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.

1,764exploited flaws on CISA’s list

35added in the last 30 days

474new WordPress flaws this week

390,714entries in the database

4,194 results · page 15 of 84

Apr 21, 2026Other issue in the JavaScript Engine component.CVE-2026-6779 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgMedium 5.3
Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Invalid pointer in the Audio/Video: Playback component.CVE-2026-6778 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgMedium 5.3
Invalid pointer in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Other issue in the Networking: DNS component.CVE-2026-6777 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgMedium 5.3
Other issue in the Networking: DNS component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Incorrect boundary conditions in the WebRTC: Networking component.CVE-2026-6776 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 7.8
Incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Incorrect boundary conditions in the WebRTC component.CVE-2026-6775 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgMedium 5.3
Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Mitigation bypass in the DOM: Security component.CVE-2026-6774 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgMedium 5.4
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Denial-of-service due to integer overflow in the Graphics: WebGPU component.CVE-2026-6773 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 7.5
Denial-of-service due to integer overflow in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Incorrect boundary conditions in the Libraries component in NSS.CVE-2026-6772 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 7.5
Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Mitigation bypass in the DOM: Security component.CVE-2026-6771 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgCritical 9.8
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Other issue in the Storage: IndexedDB component.CVE-2026-6770 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgMedium 6.5
Other issue in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Privilege escalation in the Debugger component.CVE-2026-6769 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 8.8
Privilege escalation in the Debugger component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Mitigation bypass in the Networking: Cookies component.CVE-2026-6768 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgCritical 9.8
Mitigation bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Other issue in the Libraries component in NSS.CVE-2026-6767 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgMedium 5.3
Other issue in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Incorrect boundary conditions in the Libraries component in NSS.CVE-2026-6766 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 7.5
Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Information disclosure in the Form Autofill component.CVE-2026-6765 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgMedium 5.3
Information disclosure in the Form Autofill component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Incorrect boundary conditions in the DOM: Device Interfaces component.CVE-2026-6764 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgMedium 6.5
Incorrect boundary conditions in the DOM: Device Interfaces component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Mitigation bypass in the File Handling component.CVE-2026-6763 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgMedium 6.5
Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Spoofing issue in the DOM: Core & HTML component.CVE-2026-6762 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgMedium 6.3
Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Privilege escalation in the Networking component.CVE-2026-6761 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 8.8
Privilege escalation in the Networking component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Mitigation bypass in the Networking: Cookies component.CVE-2026-6760 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgCritical 9.8
Mitigation bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Use-after-free in the Widget: Cocoa component.CVE-2026-6759 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 7.5
Use-after-free in the Widget: Cocoa component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Use-after-free in the JavaScript: WebAssembly component.CVE-2026-6758 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 7.5
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Invalid pointer in the JavaScript: WebAssembly component.CVE-2026-6757 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgMedium 6.3
Invalid pointer in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Mitigation bypass in Firefox for Android.CVE-2026-6756 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 7.5
Mitigation bypass in Firefox for Android. This vulnerability was fixed in Firefox 150.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Mitigation bypass in the DOM: postMessage component.CVE-2026-6755 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgMedium 6.5
Mitigation bypass in the DOM: postMessage component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Use-after-free in the JavaScript Engine component.CVE-2026-6754 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 7.5
Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Incorrect boundary conditions in the WebRTC component.CVE-2026-6753 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 7.3
Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Incorrect boundary conditions in the WebRTC component.CVE-2026-6752 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 7.3
Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Uninitialized memory in the Audio/Video: Web Codecs component.CVE-2026-6751 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 7.3
Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Privilege escalation in the Graphics: WebRender component.CVE-2026-6750 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 8.8
Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Information disclosure due to uninitialized memory in the Graphics: Canvas2D component.CVE-2026-6749 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 7.5
Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Uninitialized memory in the Audio/Video: Web Codecs component.CVE-2026-6748 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgCritical 9.8
Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Use-after-free in the WebRTC component.CVE-2026-6747 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 7.5
Use-after-free in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 21, 2026Use-after-free in the DOM: Core & HTML component.CVE-2026-6746 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 7.5
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 20, 2026Double-Free / Use-After-Free (UAF) in the `IntoIter::drop` and `ThinVec::clear` functions in the thin_vec crate.CVE-2026-6654 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgMedium 5.1
Double-Free / Use-After-Free (UAF) in the `IntoIter::drop` and `ThinVec::clear` functions in the thin_vec crate. A panic in `ptr::drop_in_place` skips setting the length to zero.
Product
thin-vec
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record github.com access.redhat.com
Apr 7, 2026Memory safety bugs present in Firefox 149.0.1 and Thunderbird 149.0.1.CVE-2026-5735 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgCritical 9.8
Memory safety bugs present in Firefox 149.0.1 and Thunderbird 149.0.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 149.0.2 and Thunderbird 149.0.2.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 7, 2026Memory safety bugs present in Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1.CVE-2026-5734 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgCritical 9.8
Memory safety bugs present in Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 149.0.2, Firefox ESR 140.9.1, Thunderbird 149.0.2, and Thunderbird 140.9.1.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 7, 2026Incorrect boundary conditions in the Graphics: WebGPU component.CVE-2026-5733 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 8.8
Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 149.0.2 and Thunderbird 149.0.2.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 7, 2026Incorrect boundary conditions, integer overflow in the Graphics: Text component.CVE-2026-5732 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 8.8
Incorrect boundary conditions, integer overflow in the Graphics: Text component. This vulnerability was fixed in Firefox 149.0.2, Firefox ESR 140.9.1, Thunderbird 149.0.2, and Thunderbird 140.9.1.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Apr 7, 2026Memory safety bugs present in Firefox ESR 115.34.0, Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1.CVE-2026-5731 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgCritical 9.8
Memory safety bugs present in Firefox ESR 115.34.0, Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 149.0.2, Firefox ESR 115.34.1, Firefox ESR 140.9.1, Thunderbird 149.0.2, and Thunderbird 140.9.1.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Mar 24, 2026A malicious mail server could send malformed strings with negative lengths, causing the parser to read memory outside the buffer.CVE-2026-4371 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 7.4
A malicious mail server could send malformed strings with negative lengths, causing the parser to read memory outside the buffer. If a mail server or connection to a mail server were compromised, an attacker could cause the parser to malfunction, potentially crashing Thunderbird or leaking sensitive data. This vulnerability was fixed in Thunderbird 149 and Thunderbird 140.9.
Product
Thunderbird
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Mar 24, 2026Spoofing issue in Thunderbird.CVE-2026-3889 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgMedium 6.5
Spoofing issue in Thunderbird. This vulnerability was fixed in Thunderbird 149 and Thunderbird 140.9.
Product
Thunderbird
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Mar 24, 2026Memory safety bugs present in Firefox 148 and Thunderbird 148.CVE-2026-4729 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgCritical 9.8
Memory safety bugs present in Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Mar 24, 2026Spoofing issue in the Privacy: Anti-Tracking component.CVE-2026-4728 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgMedium 6.5
Spoofing issue in the Privacy: Anti-Tracking component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Mar 24, 2026Denial-of-service in the Libraries component in NSS.CVE-2026-4727 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 7.5
Denial-of-service in the Libraries component in NSS. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Mar 24, 2026Denial-of-service in the XML component.CVE-2026-4726 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 7.5
Denial-of-service in the XML component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Mar 24, 2026Sandbox escape due to use-after-free in the Graphics: Canvas2D component.CVE-2026-4725 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgCritical 10
Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Mar 24, 2026Undefined behavior in the Audio/Video component.CVE-2026-4724 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgCritical 9.1
Undefined behavior in the Audio/Video component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Mar 24, 2026Use-after-free in the JavaScript Engine component.CVE-2026-4723 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgCritical 9.8
Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org
Mar 24, 2026Privilege escalation in the IPC component.CVE-2026-4722 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgHigh 8.8
Privilege escalation in the IPC component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
Product
Firefox
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.mozilla.org mozilla.org

Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.

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