Exposure of Resource to Wrong Sphere in gotenberg - #VU162921
Published: November 9, 2026
Vulnerability identifier: #VU162921
CSH Severity: Medium
CVSS v4: 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]
CVE-ID: N/A
CWE-ID: CWE-668
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
gotenberg
Remediation
Install security update from vendor's website.
gotenberg - update to 8.38.0