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.
30 results
Oct 21, 2026Apache Traffic Server can stall a chunked transfer that it passes through with its trailers removed (proxy.config.http.drop_chunked_trailers) until the connectiCVE-2026-111817 · Websites & servers · Apache Software Foundation · reported by security@apache.orgMedium 6.9
Apache Traffic Server can stall a chunked transfer that it passes through with its trailers removed (proxy.config.http.drop_chunked_trailers) until the connection times out, because it waits for the trailer bytes it has already dropped. Trailer dropping is on by default in 10.x. In 8.1.11 and 9.2.x it is off by default, and those versions are affected only if it is enabled. This issue affects Apache Traffic Server: 8.1.11, from 9.2.5 through 9.2.15, from 10.0.0 through 10.1.4, 10.2.0. Users are recommended to upgrade to version 10.1.5 or 10.2.1, which fix the issue.
- Product
- Apache Traffic Server
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 20, 2026Incomplete cleanup vulnerability in Apache Tomcat allowed an trailer information from a previous request to leak into a subsequent request.CVE-2026-88041 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
Incomplete cleanup vulnerability in Apache Tomcat allowed an trailer information from a previous request to leak into a subsequent request. This issue affects Apache Tomcat: from 11.0.0-M23 through 11.0.26, from 10.1.27 through 10.1.60, from 9.0.92 through 9.0.122. Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fix the issue.
- Product
- Apache Tomcat
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordlists.apache.orgopenwall.com
Oct 8, 2026When "Trailer" headers are sent by a client, the HTTP server internally uses the header values to populate the Request.Trailer map passed to the server handler.CVE-2026-78659 · Other software · Go standard library · reported by security@golang.orgHigh 7.5
When "Trailer" headers are sent by a client, the HTTP server internally uses the header values to populate the Request.Trailer map passed to the server handler. Because Request.Trailer is a map, each entry incurs memory overhead. For HTTP/2 servers, a malicious client can exploit this by sending a "Trailer" header that declares a large number of fields, causing the server to allocate a disproportionate amount of memory while bypassing Server.MaxHeaderValueCount and Server.MaxHeaderBytes limits. This exploit is not applicable for HTTP/1 servers, which do not support multiplexing a large number of requests over one TCP connection, and whose Server.MaxHeaderBytes are calculated differently.
- Product
- net/http
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 26, 2026AVideo before 29.1.0 contains a stored cross-site scripting vulnerability in the video trailer1 field rendered unsanitized within an inline onclick JavaScript sCVE-2026-100630 · Other software · WWBN · reported by VulnCheckMedium 5.1
AVideo before 29.1.0 contains a stored cross-site scripting vulnerability in the video trailer1 field rendered unsanitized within an inline onclick JavaScript string. Attackers with video upload permission can store HTML entity-encoded payloads that bypass isValidURL() validation and are decoded by the browser to break out of the JavaScript string, executing arbitrary code in any visitor's session including administrators.
- Product
- AVideo
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 23, 2026Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache Tomcat allows an attacker to inject trailer CVE-2026-77762 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 8.1
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache Tomcat allows an attacker to inject trailer fields into another HTTP/2 request. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.39 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.59 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fix the issue.
- Product
- Apache Tomcat
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordlists.apache.orgopenwall.com
Sep 16, 2026In the Linux kernel, the following vulnerability has been resolved: ext4: check dir entry fits before reading the hash trailer in ext4_search_dir() For casefoCVE-2026-89787 · Computers, phones & browsers · Linux · reported by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
In the Linux kernel, the following vulnerability has been resolved: ext4: check dir entry fits before reading the hash trailer in ext4_search_dir() For casefolded encrypted directories ext4 stores an 8-byte hash trailer after the name (EXT4_DIRENT_HASHES()), at an offset derived from de->name_len. On the sb_no_casefold_compat_fallback() path ext4_match() reads that trailer, but ext4_search_dir()'s by-hand pre-check only tests de->name + de->name_len <= dlimit, which proves the name fits, not the rounded trailer. A crafted entry whose name ends at the block boundary passes the check while EXT4_DIRENT_HASHES(de) lands past the block end, so ext4_match() reads out of bounds on an ordinary lookup. KASAN reports it as a use-after-free when the page after the directory block holds a freed object: BUG: KASAN: use-after-free in ext4_match (fs/ext4/namei.c:1435) Read of size 4 at addr ffff888010458000 by task exploit Call Trace: ext4_match (fs/ext4/namei.c:1435) ext4_search_dir (fs/ext4/namei.c:1470) __ext4_find_entry (fs/ext4/namei.c:1268 fs/ext4/namei.c:1632) ext4_lookup (fs/ext4/namei.c:1703 fs/ext4/namei.c:1769) ... filename_lookup (fs/namei.c:2842) vfs_
- Product
- Linux
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgit.kernel.orggit.kernel.org
Sep 11, 2026In the Linux kernel, the following vulnerability has been resolved: orangefs: fix double-free of trailer_buf on readdir copy failure On a readdir downcall, orCVE-2026-89498 · Computers, phones & browsers · Linux · reported by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
In the Linux kernel, the following vulnerability has been resolved: orangefs: fix double-free of trailer_buf on readdir copy failure On a readdir downcall, orangefs_devreq_write_iter() frees op->downcall.trailer_buf with vfree() when copy_from_iter_full() fails, but does not clear the pointer before goto Efault. The waiter in do_readdir() is then woken with a negative status and frees the same pointer again on its r < 0 path, causing a deterministic double-free. A client holding /dev/pvfs2-req triggers it by sending a readdir downcall whose declared trailer_size exceeds the bytes it supplies. Clear the pointer after freeing so the readdir-side vfree() becomes a no-op.
- Product
- Linux
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgit.kernel.orggit.kernel.org
Jul 29, 2026Apache Traffic Server forwards HTTP/2 origin trailers to HTTP/1 clients without proper chunked framing when converting HTTP/2 to HTTP/1.CVE-2026-58153 · Websites & servers · Apache Software Foundation · reported by security@apache.orgMedium 6.3
Apache Traffic Server forwards HTTP/2 origin trailers to HTTP/1 clients without proper chunked framing when converting HTTP/2 to HTTP/1. This issue affects Apache Traffic Server: from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.
- Product
- Apache Traffic Server
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 14, 2026Eclipse Grizzly in versions before 5.0.2, cannot properly parse the trailer section in malformed trailer header's line, which can be leveraged to perform HTTP rCVE-2026-12606 · Other software · Eclipse Foundation · reported by emo@eclipse.orgMedium 6.3
Eclipse Grizzly in versions before 5.0.2, cannot properly parse the trailer section in malformed trailer header's line, which can be leveraged to perform HTTP request smuggling. Grizzly 5.0.1 supports system properties that enable the behavior that fixes the vulnerability - set org.glassfish.grizzly.http.STRICT_HEADER_NAME_VALIDATION_RFC_9110 and org.glassfish.grizzly.http.STRICT_HEADER_VALUE_VALIDATION_RFC_9110 system properties to "true".
- Product
- Eclipse GlassFish
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 14, 2026In Eclipse Jetty, a first HTTP/1.1 request with trailers causes the server to retain the trailers in subsequent requests performed over the same connection.CVE-2026-10051 · Other software · Eclipse Foundation · reported by emo@eclipse.orgMedium 6.9
In Eclipse Jetty, a first HTTP/1.1 request with trailers causes the server to retain the trailers in subsequent requests performed over the same connection. Subsequent request that do not have trailers report the trailers of the first request. Subsequent request that do have trailers report the union of trailers of the first request and the current request.
- Product
- Eclipse Jetty
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Nov 3, 2025lighttpd1.4.80 incorrectly merged trailer fields into headers after http request parsing.CVE-2025-12642 · Other software · lighttpd · reported by 1c6b5737-9389-4011-8117-89fa251edfb2Medium 6.9
lighttpd1.4.80 incorrectly merged trailer fields into headers after http request parsing. This behavior can be exploited to conduct HTTP Header Smuggling attacks. Successful exploitation may allow an attacker to: * Bypass access control rules * Inject unsafe input into backend logic that trusts request headers * Execute HTTP Request Smuggling attacks under some conditions This issue affects lighttpd1.4.80
- Product
- lighttpd
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 9, 2025lib.rs in the trailer crate through 0.1.2 for Rust mishandles allocating with a size of zero.CVE-2025-47737 · Other software · Geal · reported by MITRELow 2.9
lib.rs in the trailer crate through 0.1.2 for Rust mishandles allocating with a size of zero.
- Product
- trailer
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 26, 2024Apache Traffic Server forwards malformed HTTP chunked trailer section to origin servers.CVE-2024-35161 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
Apache Traffic Server forwards malformed HTTP chunked trailer section to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4. Users can set a new setting (proxy.config.http.drop_chunked_trailers) not to forward chunked trailer section. Users are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.
- Product
- Apache Traffic Server
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordlists.apache.orglists.apache.org
Jun 27, 2024A Stack Buffer Overflow vulnerability in zziplibv 0.13.77 allows attackers to cause a denial of service via the __zzip_fetch_disk_trailer() function at /zzip/ziCVE-2024-39134 · Other software · zziplib · reported by MITREHigh 7.5
A Stack Buffer Overflow vulnerability in zziplibv 0.13.77 allows attackers to cause a denial of service via the __zzip_fetch_disk_trailer() function at /zzip/zip.c.
- Product
- zziplib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 13, 2022Infinite loop in the F5 Ethernet Trailer protocol dissector in Wireshark 3.6.0 to 3.6.7 and 3.4.0 to 3.4.15 allows denial of service via packet injection or craCVE-2022-3190 · Other software · SharkFest Foundation · reported by cve@gitlab.comMedium 6.3
Infinite loop in the F5 Ethernet Trailer protocol dissector in Wireshark 3.6.0 to 3.6.7 and 3.4.0 to 3.4.15 allows denial of service via packet injection or crafted capture file
- Product
- Wireshark
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 18, 2022libjpeg commit 281daa9 was discovered to contain an infinite loop via the component Frame::ParseTrailer.CVE-2022-37768 · Other software · Jpeg · reported by MITREHigh 7.5
libjpeg commit 281daa9 was discovered to contain an infinite loop via the component Frame::ParseTrailer.
- Product
- Libjpeg
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Mar 10, 2022Power Line Communications PLC4TRUCKS J2497 trailer receivers are susceptible to remote RF induced signals.CVE-2022-26131 · Other software · Power Line Communications · reported by ics-cert@hq.dhs.govCritical 9.3
Power Line Communications PLC4TRUCKS J2497 trailer receivers are susceptible to remote RF induced signals.
- Product
- PLC4TRUCKS
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Mar 10, 2022Power Line Communications PLC4TRUCKS J2497 trailer brake controllers implement diagnostic functions which can be invoked by replaying J2497 messages.CVE-2022-25922 · Other software · Power Line Communications · reported by ics-cert@hq.dhs.govMedium 6.1
Power Line Communications PLC4TRUCKS J2497 trailer brake controllers implement diagnostic functions which can be invoked by replaying J2497 messages. There is no authentication or authorization for these functions.
- Product
- PLC4TRUCKS
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 9, 2021Foxit Reader before 10.1.4 and PhantomPDF before 10.1.4 have an out-of-bounds write via a crafted /Size key in the Trailer dictionary.CVE-2021-33792 · Other software · Foxitsoftware · reported by MITREHigh 7.8
Foxit Reader before 10.1.4 and PhantomPDF before 10.1.4 have an out-of-bounds write via a crafted /Size key in the Trailer dictionary.
- Product
- Foxit Reader
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordfoxitsoftware.comfoxitsoftware.com
Sep 1, 2020All trailer Power Line Communications are affected.CVE-2020-14514 · Other software · Multiple Vendors All trailer power line communications are affected. · reported by ics-cert@hq.dhs.govMedium 4.3
All trailer Power Line Communications are affected. PLC bus traffic can be sniffed reliably via an active antenna up to 6 feet away. Further distances are also possible, subject to environmental conditions and receiver improvements.
- Product
- Trailer Power Line Communications
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordus-cert.cisa.govus-cert.cisa.gov
Jul 7, 2019In FFmpeg 4.1.3, there is a division by zero at adx_write_trailer in libavformat/rawenc.c.CVE-2019-13390 · Other software · Ffmpeg · reported by MITREMedium 6.5
In FFmpeg 4.1.3, there is a division by zero at adx_write_trailer in libavformat/rawenc.c.
- Product
- Ffmpeg
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordsecurityfocus.comlists.debian.org
Dec 31, 2018An issue in the Proxygen handling of HTTP2 parsing of headers/trailers can lead to a denial-of-service attack.CVE-2018-6347 · Other software · Facebook · reported by cve-assign@fb.comHigh 7.5
An issue in the Proxygen handling of HTTP2 parsing of headers/trailers can lead to a denial-of-service attack. This affects Proxygen prior to v2018.12.31.00.
- Product
- Proxygen
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Feb 2, 2018In ZZIPlib 0.13.67, there is a bus error (when handling a disk64_trailer seek value) caused by loading of a misaligned address in the zzip_disk_findfirst functiCVE-2018-6542 · Other software · Gdraheim · reported by MITREMedium 6.5
In ZZIPlib 0.13.67, there is a bus error (when handling a disk64_trailer seek value) caused by loading of a misaligned address in the zzip_disk_findfirst function of zzip/mmapped.c.
- Product
- Zziplib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Feb 2, 2018In ZZIPlib 0.13.67, there is a bus error caused by loading of a misaligned address (when handling disk64_trailer local entries) in __zzip_fetch_disk_trailer (zzCVE-2018-6541 · Other software · Gdraheim · reported by MITREMedium 6.5
In ZZIPlib 0.13.67, there is a bus error caused by loading of a misaligned address (when handling disk64_trailer local entries) in __zzip_fetch_disk_trailer (zzip/zip.c). Remote attackers could leverage this vulnerability to cause a denial of service via a crafted zip file.
- Product
- Zziplib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordaccess.redhat.comgithub.com
Feb 1, 2018In ZZIPlib 0.13.67, there is a memory alignment error and bus error in the __zzip_fetch_disk_trailer function of zzip/zip.c.CVE-2018-6484 · Other software · Gdraheim · reported by MITREMedium 6.5
In ZZIPlib 0.13.67, there is a memory alignment error and bus error in the __zzip_fetch_disk_trailer function of zzip/zip.c. Remote attackers could leverage this vulnerability to cause a denial of service via a crafted zip file.
- Product
- Zziplib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgithub.comlists.debian.org
Jan 24, 2018libcurl 7.49.0 to and including 7.57.0 contains an out bounds read in code handling HTTP/2 trailers.CVE-2018-1000005 · Other software · Haxx · reported by MITRECritical 9.1
libcurl 7.49.0 to and including 7.57.0 contains an out bounds read in code handling HTTP/2 trailers. It was reported (https://github.com/curl/curl/pull/2231) that reading an HTTP/2 trailer could mess up future trailers since the stored size was one byte less than required. The problem is that the code that creates HTTP/1-like headers from the HTTP/2 trailer data once appended a string like `:` to the target buffer, while this was recently changed to `: ` (a space was added after the colon) but the following math wasn't updated correspondingly. When accessed, the data is read out of bounds and causes either a crash or that the (too large) data gets passed to client write. This could lead to a denial-of-service situation or an information disclosure if someone has a service that echoes back or uses the trailers for something.
- Product
- Libcurl
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordsecuritytracker.comaccess.redhat.com
Dec 13, 2017Multiplex Movie Theater Booking Script 3.1.5 has SQL Injection via the trailer-detail.php moid parameter, show-time.php moid parameter, or event-detail.php eid CVE-2017-17633 · Other software · Multiplex Movie Theater Booking Script Project · reported by MITRECritical 9.8
Multiplex Movie Theater Booking Script 3.1.5 has SQL Injection via the trailer-detail.php moid parameter, show-time.php moid parameter, or event-detail.php eid parameter.
- Product
- Multiplex Movie Theater Booking Script
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordpacketstormsecurity.comexploit-db.com
Feb 28, 2017An exploitable heap corruption vulnerability exists in the loadTrailer functionality of Iceni Argus version 6.6.05.CVE-2016-8715 · Other software · Iceni · reported by talos-cna@cisco.comHigh 7.8
An exploitable heap corruption vulnerability exists in the loadTrailer functionality of Iceni Argus version 6.6.05. A specially crafted PDF file can cause a heap corruption resulting in arbitrary code execution. An attacker can send/provide a malicious PDF file to trigger this vulnerability.
- Product
- Argus
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordsecurityfocus.comtalosintelligence.com
Jan 4, 2016The mp2t_find_next_pcr function in wiretap/mp2t.c in the MP2T file parser in Wireshark 2.0.x before 2.0.1 does not reserve memory for a trailer, which allows reCVE-2015-8736 · Other software · Wireshark · reported by MITREMedium 5.5
The mp2t_find_next_pcr function in wiretap/mp2t.c in the MP2T file parser in Wireshark 2.0.x before 2.0.1 does not reserve memory for a trailer, which allows remote attackers to cause a denial of service (stack-based buffer overflow and application crash) via a crafted file.
- Product
- Wireshark
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordsecurityfocus.comsecuritytracker.com
Apr 15, 2014The mod_headers module in the Apache HTTP Server 2.2.22 allows remote attackers to bypass "RequestHeader unset" directives by placing a header in the trailer poCVE-2013-5704 · Websites & servers · Apache · reported by MITREMedium 5
The mod_headers module in the Apache HTTP Server 2.2.22 allows remote attackers to bypass "RequestHeader unset" directives by placing a header in the trailer portion of data sent with chunked transfer coding. NOTE: the vendor states "this is not a security issue in httpd as such."
- Product
- Http Server
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordlists.apple.comlists.apple.com
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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