CVE-2026-55229: Gotenberg: SSRF via LibreOffice document processing

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-07-10 · updated 2026-07-13
Weakness: CWE-918

Description

Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.34.0, Gotenberg's /forms/libreoffice/convert endpoint allows a specially crafted document to cause LibreOffice to automatically retrieve external HTTP(S) resources and local file resources during document conversion, enabling blind SSRF and limited local file disclosure via linked image resource loading. This issue is fixed in version 8.34.0.

Affected products

gotenberg: before 8.34.0

References

https://github.com/gotenberg/gotenberg/commit/98fc40347885ad510a311b990a73397c6d4143db
https://github.com/gotenberg/gotenberg/releases/tag/v8.34.0
https://github.com/gotenberg/gotenberg/security/advisories/GHSA-2mrg-35hw-x3x9
https://github.com/gotenberg/gotenberg/security/advisories/GHSA-2mrg-35hw-x3x9

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