Vulnerability · Published Apr 7, 2026 · Assigned by GitHub_M
CVE-2026-35458Gotenberg has a ReDoS via extraHttpHeaders scope feature
Critical 9.8
In plain English
A critical-severity regular-expression denial of service in gotenberg from gotenberg. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.5%top 55.8% 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. In 8.29.1 and earlier, Gotenberg uses dlclark/regexp2 to compile user-supplied scope patterns without setting a proper timeout. Users with access to features using this logic can hang workers indefinitely.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/gotenberg/gotenberg/v7 | no fix listed | GO-2026-5372 |
| Go | github.com/gotenberg/gotenberg/v8 | 8.30.0 | GHSA-fmwg-qcqh-m992 |
| Go | github.com/gotenberg/gotenberg/v8 | 8.30.0 | GO-2026-5372 |
Affected products (as reported)
Weakness: CWE-1333 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/gotenberg/gotenberg/security/advisories/GHSA-fmwg-qcqh-m992 x_refsource_CONFIRM