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.
6 results
Jul 31, 2026Thumbor is an open-source photo thumbnail service by globo.com.CVE-2026-53505 · Other software · thumbor · reported by GitHubHigh 7.5
Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:proportion(<value>) filter does not enforce an upper bound on <value> and runs in the post-transform phase. An attacker can trigger extremely large resizes (CPU/memory exhaustion) and cause denial of service. This issue is fixed in 7.8.0.
- Product
- thumbor
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 31, 2026Thumbor is an open-source photo thumbnail service by globo.com.CVE-2026-53504 · Other software · thumbor · reported by GitHubHigh 7.5
Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the convolution filter regular expression performs exponential backtracking on crafted repeated numeric input, allowing a URL request to exhaust processing time. This issue is fixed in 7.8.0.
- Product
- thumbor
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 31, 2026Thumbor is an open-source photo thumbnail service by globo.com.CVE-2026-53503 · Other software · thumbor · reported by GitHubHigh 7.5
Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:convolution(<matrix>, <columns>, <should_normalize>) filter passes the user-controlled <columns> value to a C extension (thumbor/ext/filters/_convolution.c) where it is used as a divisor (for % and /) without validating columns > 0. When columns=0, the C code triggers undefined behavior; on x86_64 this reliably results in a fatal divide-by-zero trap (SIGFPE) and crashes the Thumbor process, causing a remote denial of service. This issue is fixed in 7.8.0.
- Product
- thumbor
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 31, 2026Thumbor is an open-source photo thumbnail service by globo.com.CVE-2026-53502 · Other software · thumbor · reported by GitHubHigh 8.7
Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, file_loader decodes percent-encoded path segments after its root-boundary validation, allowing traversal outside FILE_LOADER_ROOT_PATH through watermark or frame filter input. This issue is fixed in 7.8.0.
- Product
- thumbor
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 31, 2026Thumbor is an open-source photo thumbnail service by globo.com.CVE-2026-53501 · Other software · thumbor · reported by GitHubHigh 8.2
Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor’s HMAC validation can be bypassed due to the use of Python’s .replace() when removing the signature from the URL before validation. Since .replace() removes all occurrences of the substring, an attacker can insert the same signature multiple times in the URL and manipulate the final URL used for validation. This allows crafting URLs where the validated string differs from the actual requested resource, enabling loading images from unintended domains or paths. This issue is fixed in 7.8.0.
- Product
- thumbor
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 31, 2026Thumbor is an open-source photo thumbnail service by globo.com.CVE-2026-53500 · Other software · thumbor · reported by GitHubHigh 8.2
Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the ALLOWED_SOURCES configuration passes plain strings to re.match() without escaping dots, so a hostname differing at dot positions can match the allowlist. This issue is fixed in 7.8.0.
- Product
- thumbor
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
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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