Server-Side Request Forgery (SSRF) in gotenberg - CVE-2026-42595
Published: May 5, 2026
Vulnerability identifier: #VU129640
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-42595
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: thecodingmachine
Affected software:
gotenberg
gotenberg
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information from internal network resources.
The vulnerability exists due to server-side request forgery in the Chromium URL conversion endpoint when processing user-supplied URLs and following redirects. A remote attacker can submit a crafted URL to make the server fetch internal HTTP or HTTPS resources and disclose sensitive information from internal network resources.
The issue affects the /forms/chromium/convert/url endpoint, and redirects to internal destinations are followed without re-validating the redirect target.
How to mitigate CVE-2026-42595
Install security update from vendor's website.