CVE-2026-40893

Description

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.

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CVSS v3.1 Score

8.2

HIGH

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

EPSS — Exploit Prediction

0.0016

Probability of exploitation

0.36%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-73 CWE-73

CWE-184 CWE-184

Affected Products

Vendor	Product	Versions
thecodingmachine	gotenberg	< 8.31.0

References

Advisories & Patches

https://github.com/gotenberg/gotenberg/security/advisories/GHSA-62p3-hvxx-fxg4 https://github.com/gotenberg/gotenberg/security/advisories/GHSA-62p3-hvxx-fxg4

Exploits

https://github.com/gotenberg/gotenberg/security/advisories/GHSA-62p3-hvxx-fxg4 https://github.com/gotenberg/gotenberg/security/advisories/GHSA-62p3-hvxx-fxg4

Frequently Asked Questions

What is CVE-2026-40893? +

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. It has a CVSS v3.1 base score of 8.2 (HIGH).

How severe is CVE-2026-40893? +

CVE-2026-40893 has a CVSS v3.1 score of 8.2 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0016, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-40893? +

CVE-2026-40893 affects products from thecodingmachine, specifically: gotenberg. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-40893? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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