CVE-2026-42589 — exposed on the internet

Internet exposure observed by OffSeq scans · last 30 days

Found on 1 internet-exposed hosts by OffSeq scans; no in-the-wild exploitation has been observed against OffSeq honeypots in this window.

About CVE-2026-42589

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.

CWE-78

OffSeq internet scanning found CVE-2026-42589 on 1 exposed hosts in the last 30 days. OffSeq honeypots have not recorded in-the-wild exploitation of this CVE in the current window — this page tracks its exposure footprint and status; if exploitation begins, the live honeypot signal will appear here.

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