Vulnerability · Published May 14, 2026 · Assigned by GitHub_M
CVE-2026-42595Gotenberg: Server-Side Request Forgery via Chromium URL Endpoint with Redirect-Based Deny-List Bypass
High 8.6
In plain English
A high-severity server-side request forgery in gotenberg from gotenberg. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.32.0, Gotenberg's Chromium URL-to-PDF endpoint (/forms/chromium/convert/url) has no default protection against HTTP/HTTPS-based SSRF. The default deny-list regex only blocks file:// URIs. An unauthenticated attacker can point Chromium at any internal IP — including loopback, RFC 1918 ranges, and cloud metadata endpoints — and receive the response rendered as a PDF. Additionally, even when operators configure a custom deny-list, the protection is bypassed via HTTP redirects. Gotenberg's Chromium instance follows 302 redirects from an attacker-controlled external URL to internal targets without re-validating the redirect destination against the deny-list. This vulnerability is fixed in 8.32.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/gotenberg/gotenberg/v7 | no fix listed | GO-2026-5324 |
| Go | github.com/gotenberg/gotenberg/v8 | 8.32.0 | GHSA-chwh-f6gm-r836 |
| Go | github.com/gotenberg/gotenberg/v8 | 8.32.0 | GO-2026-5324 |
Affected products (as reported)
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
References
- https://github.com/gotenberg/gotenberg/security/advisories/GHSA-chwh-f6gm-r836 x_refsource_CONFIRM