SB20261109156 - Server-Side Request Forgery (SSRF) in gotenberg

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Main Vulnerability Database SB20261109156

SB20261109156 - Server-Side Request Forgery (SSRF) in gotenberg

Published: November 9, 2026

Security Bulletin ID SB20261109156
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Server-Side Request Forgery (SSRF) (CVE-ID: CVE-2026-55229)

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows an unauthenticated remote attacker to cause Gotenberg to issue server-side HTTP(S) requests to attacker-controlled destinations.

The vulnerability exists due to automatic external resource retrieval by LibreOffice when processing crafted DOCX documents under Gotenberg's default configuration. An unauthenticated remote attacker can upload a document containing an external image reference to /forms/libreoffice/convert and trigger an outbound request during conversion.


Remediation

Install update from vendor's website.

References