CVE-2026-27018

Gotenberg: Chromium deny-list bypass via case-insensitive URL scheme

CVSS 7.8 HIGHEPSS 0.5%CWE-22 CWE-918

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.8EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

30 Mar 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

Gotenberg is an API for converting document formats. Prior to version 8.29.0, the fix introduced for CVE-2024-21527 can be bypassed using mixed-case or uppercase URL schemes. This issue has been patched in version 8.29.0.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

Affected products

gotenberg · gotenberg

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References

https://github.com/gotenberg/gotenberg/commit/06b2b2e10c52b58135edbfe82e94d599eb0c5a11 https://github.com/gotenberg/gotenberg/commit/8625a4e899eb75e6fcf46d28394334c7fd79fff5 https://github.com/gotenberg/gotenberg/releases/tag/v8.29.0 https://github.com/gotenberg/gotenberg/security/advisories/GHSA-jjwv-57xh-xr6r