Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-42596

Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.31.0, the default deny-lists used by Gotenberg's downloadFrom feature and webhook feature are bypassable. Because the filter is regex-based and case-sensitive, an unauthenticated attacker can supply URLs such as http://[::ffff:127.0.0.1]:... and reach loopback or private HTTP services that the default deny-list is intended to block. This crosses a real security boundary because an external caller can force the server to make outbound requests to internal-only targets. This vulnerability is fixed in 8.31.0.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 24.3%
CVSS Severity
CVSS v3 Score 9.4
Products affected by CVE-2026-42596


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