SB20261109157 - Multiple vulnerabilities in gotenberg

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Main Vulnerability Database SB20261109157

SB20261109157 - Multiple vulnerabilities in gotenberg

Published: November 9, 2026

Security Bulletin ID SB20261109157
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Resource exhaustion (CVE-ID: N/A)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows an unauthenticated remote attacker to consume server resources beyond Gotenberg's configured request body limit.

The vulnerability exists due to enforcement of api-body-limit only after complete multipart parsing when a positive limit is configured. An unauthenticated remote attacker can submit an oversized body to a reachable multipart conversion route within api-timeout, causing the entire request to be read and parsed before rejection.


2) Exposure of Resource to Wrong Sphere (CVE-ID: N/A)

CWE-ID: CWE-668 - Exposure of resource to wrong sphere

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote API client to access another user's session-protected content through Gotenberg conversions.

The vulnerability exists due to a shared Chromium cookie jar across conversions in deployments serving mutually untrusted users with default cookie retention. A remote API client can request conversion of a known origin after a victim supplies a valid cookie, obtaining authenticated content before that cookie expires or Chromium restarts.


3) Server-Side Request Forgery (SSRF) (CVE-ID: N/A)

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

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N]


The vulnerability allows an unauthenticated remote attacker to bypass outbound restrictions and read internal WebSocket service data through server-side request forgery.

The vulnerability exists due to missing WebSocket policy enforcement in Gotenberg's Chromium component when URL allow/deny lists are configured while --chromium-deny-private-ips and --chromium-deny-public-ips remain false. An unauthenticated remote attacker can submit a conversion URL serving controlled JavaScript from an allowed origin to connect to blocked loopback or link-local services and include returned data in the generated PDF.


Remediation

Install update from vendor's website.

References