CVE-2026-42596

9.4 CRITICAL

Gotenberg is a Docker-powered stateless API for PDF files

Published: 2026-05-14 · Last updated: 2026-05-18

Severity and scoring

CVSS: 9.4 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CWE: CWE-918

Affected products

Vendor	Product
thecodingmachine	gotenberg

Description

Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.31.0, the default deny-lists used by Gotenberg's downloadFrom feature and webhook feature are bypassable. Because the filter is regex-based and case-sensitive, an unauthenticated attacker can supply URLs such as http://[::ffff:127.0.0.1]:... and reach loopback or private HTTP services that the default deny-list is intended to block. This crosses a real security boundary because an external caller can force the server to make outbound requests to internal-only targets. This vulnerability is fixed in 8.31.0.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-42596
[Vendor advisory]https://github.com/gotenberg/gotenberg/security/advisories/GHSA-4vmc-gm8v-m35h
[Vendor advisory]https://github.com/gotenberg/gotenberg/security/advisories/GHSA-4vmc-gm8v-m35h

Related CVEs

Same vendor

CVE-2026-42597 — Gotenberg is a Docker-powered stateless API for PDF files (5.9 MEDIUM)
CVE-2026-42595 — Gotenberg is a Docker-powered stateless API for PDF files (8.6 HIGH)
CVE-2026-42594 — Gotenberg is a Docker-powered stateless API for PDF files (7.5 HIGH)
CVE-2026-42593 — Gotenberg is a Docker-powered stateless API for PDF files (5.3 MEDIUM)
CVE-2026-42592 — Gotenberg is a Docker-powered stateless API for PDF files (5.3 MEDIUM)

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