CVE-2026-42589

Description

Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.31.0, Gotenberg's /forms/pdfengines/metadata/write HTTP endpoint accepts a JSON metadata object and passes its keys directly to ExifTool via the go-exiftool library. No validation is performed on key characters. A \n embedded in a JSON key splits the ExifTool stdin stream into a new argument line, allowing an attacker to inject arbitrary ExifTool flags — including -if, which evaluates Perl expressions. This achieves unauthenticated OS command execution in a single HTTP request. The response is HTTP 200 with a valid PDF, making the attack transparent to basic monitoring. This vulnerability is fixed in 8.31.0.

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Produits concernés

• gotenberg
• Thecodingmachine gotenberg

Scores CVSS

Faiblesses (CWE)

• CWE-78

Références

• https://github.com/gotenberg/gotenberg/security/advisories/GHSA-rqgh-gxv4-6657 ExploitMitigationVendor Advisory
• https://github.com/gotenberg/gotenberg/security/advisories/GHSA-rqgh-gxv4-6657 ExploitMitigationVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories