CVE-2026-40893

Gotenberg: ExifTool Dangerous Tag Blocklist Bypass via Group-Prefixed Tag Names Allows Arbitrary File Rename and Move

Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.31.0, Gotenberg only checks if the tag is exactly FileName, so System:FileName slips right through and ExifTool happily renames the file. This allows remote attackers to move, rename, and change permissions for arbitrary files. This vulnerability is fixed in 8.31.0.

Affected

gotenberg

CVSS v3.1 GITHUB

8.2 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

EPSS

0.51% chance of exploitation in the next 30 days, 42nd percentile

Published

2026-05-14

Proof-of-concept exploits (1)

• advisories/GHSA-62p3-hvxx-fxg4

Security advisories

• gotenberg/gotenberg/security/advisories/GHSA-62p3-hvxx-fxg4

References

• CVE Record
• NVD entry