Time-of-check Time-of-use (TOCTOU) Affecting gotenberg package, versions <8.32.0-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CHAINGUARDLATEST-GOTENBERG-17972921
- published15 Jul 2026
- disclosed14 May 2026
Introduced: 14 May 2026
CVE-2026-42592 (opens in a new tab)How to fix?
Upgrade Chainguard gotenberg to version 8.32.0-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream gotenberg package and not the gotenberg package as distributed by Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
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.