Gotenberg has Unauthenticated RCE via ExifTool Metadata Key Injection — CVE-2026-42589

Summary

# Unauthenticated RCE in Gotenberg via Metadata Key Newline Injection ## Summary 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…

Product

go: github.com/gotenberg/gotenberg/v8

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

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