Vulnerability · Published Mar 30, 2026 · Assigned by GitHub_M
CVE-2026-27018Gotenberg: Chromium deny-list bypass via case-insensitive URL scheme
High 7.8
In plain English
A high-severity path traversal in gotenberg from gotenberg. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 77% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)7.8High
Exploit odds (30 days)1.7%top 22.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/gotenberg/gotenberg/v7 | no fix listed | GHSA-jjwv-57xh-xr6r |
| Go | github.com/gotenberg/gotenberg/v7 | no fix listed | GO-2026-4905 |
| Go | github.com/gotenberg/gotenberg/v8 | 8.29.0 | GHSA-jjwv-57xh-xr6r |
| Go | github.com/gotenberg/gotenberg/v8 | 8.29.0 | GO-2026-4905 |
Affected products (as reported)
Weakness: CWE-22, CWE-918 · Vector: 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
References
- https://github.com/gotenberg/gotenberg/security/advisories/GHSA-jjwv-57xh-xr6r x_refsource_CONFIRM
- https://github.com/gotenberg/gotenberg/commit/06b2b2e10c52b58135edbfe82e94d599eb0c5a11 x_refsource_MISC
- https://github.com/gotenberg/gotenberg/commit/8625a4e899eb75e6fcf46d28394334c7fd79fff5 x_refsource_MISC
- https://github.com/gotenberg/gotenberg/releases/tag/v8.29.0 x_refsource_MISC