CVE-2026-42592

5.3 MEDIUM

Gotenberg is a Docker-powered stateless API for PDF files

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

Severity and scoring

CVSS: 5.3 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE: CWE-367, CWE-918

Affected products

Vendor	Product
thecodingmachine	gotenberg

Description

Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.32.0, FilterOutboundURL resolves the hostname, checks the resolved IPs against the private-address deny-list, and returns only the error. It discards the resolved addresses. Chromium later performs its own DNS resolution when it navigates to the URL. An attacker who controls DNS for a hostname with a short TTL returns a public IP on the first query (Gotenberg allows) and a private IP on the second query (Chromium connects to the attacker-chosen internal address). The CDP Fetch.requestPaused handler re-checks the URL but runs its own DNS resolution, leaving a timing window before Chromium's actual TCP connect. The rendered internal service response returns to the caller as a PDF. This vulnerability is fixed in 8.32.0.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-42592
[Vendor advisory]https://github.com/gotenberg/gotenberg/security/advisories/GHSA-2pmr-289p-44r3
[Vendor advisory]https://github.com/gotenberg/gotenberg/security/advisories/GHSA-2pmr-289p-44r3

Related CVEs

Same vendor

CVE-2026-42597 — Gotenberg is a Docker-powered stateless API for PDF files (5.9 MEDIUM)
CVE-2026-42596 — Gotenberg is a Docker-powered stateless API for PDF files (9.4 CRITICAL)
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)

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