CVE-2026-42589: Improper Neutralization of Special Elements used in an OS Command

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 i...

PT-2026-38380

Name of the Vulnerable Software and Affected Versions Gotenberg versions prior to 8.31.0 Description An unauthenticated remote attacker can achieve OS command execution via the '/forms/pdfengines/metadata/write' endpoint. The application accepts a JSON metadata object and passes its keys to...

Gotenberg has ExifTool stdin argument injection via metadata value newlines (bypass of key sanitization fix)

Vulnerability Details CWE: CWE-20 - Improper Input Validation The metadata value sanitization introduced in v8.30.1 commit 405f106 only validates metadata KEYS via safeKeyPattern regex. Metadata VALUES are passed unsanitized to go-exiftool SetString, which writes them as fmt.Fprintlne.stdin,...