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Vulnerability details

CVE-2026-42595

gotenberg gotenberg

Gotenberg: Server-Side Request Forgery via Chromium URL Endpoint with Redirect-Based Deny-List Bypass

CVSS 3.1
8.6High

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.

CVSS scores

ScoreVersionSourceVector
8.6High 3.1 CVEProject cvelistV5 (CNA) (GitHub_M) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Affected products

VendorProductVersionsSource
gotenberg gotenberg < 8.32.0 CVEProject cvelistV5 (CNA)

References and advisories

1
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Details

Published
2026-05-14
Last updated
2026-05-14
State
Published
Assigner (CNA)
GitHub_M

Exploit prediction (EPSS)

0.31%
Probability of exploitation in 30 days
24.3%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
Yes
Exploitation
Proof of concept
Technical impact
Partial

Weaknesses (CWE)

  • CWE-918
    Server-Side Request Forgery (SSRF)