Critical severity9.4GHSA Advisory· Published May 14, 2026· Updated May 18, 2026
CVE-2026-42596
CVE-2026-42596
Description
Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.31.0, the default deny-lists used by Gotenberg's downloadFrom feature and webhook feature are bypassable. Because the filter is regex-based and case-sensitive, an unauthenticated attacker can supply URLs such as http://[::ffff:127.0.0.1]:... and reach loopback or private HTTP services that the default deny-list is intended to block. This crosses a real security boundary because an external caller can force the server to make outbound requests to internal-only targets. This vulnerability is fixed in 8.31.0.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/gotenberg/gotenberg/v8Go | < 8.32.0 | 8.32.0 |
Affected products
3Patches
Vulnerability mechanics
References
3- github.com/gotenberg/gotenberg/security/advisories/GHSA-4vmc-gm8v-m35hnvdExploitMitigationVendor AdvisoryWEB
- github.com/advisories/GHSA-4vmc-gm8v-m35hghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-42596ghsaADVISORY
News mentions
0No linked articles in our index yet.