TI-2026-30875 Aliases CVE-2026-42595 GHSA-chwh-f6gm-r836

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

HIGH 76CWE-918Published 2026-05-14 · Updated 2026-05-14

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00313 24th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed gotenberg (gotenberg): 8.32.0github.com/gotenberg/gotenberg/v8 (Go): 8.32.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
gotenberg	gotenberg	before 8.32.0	8.32.0	Patch available	CNA
—	github.com/gotenberg/gotenberg/v8 (Go)	before 8.32.0	8.32.0	Patch available	GHSA-chwh-f6gm-r836

gotenberg Vendorgotenberg Affected before 8.32.0 Fixed in 8.32.0 Patch available CNA
github.com/gotenberg/gotenberg/v8 (Go) Vendor— Affected before 8.32.0 Fixed in 8.32.0 Patch available GHSA-chwh-f6gm-r836

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:thecodingmachine:gotenberg::::::::	before 8.32.0	Vulnerable	gotenberg

cpe:2.3:a:thecodingmachine:gotenberg:*:*:*:*:*:*:*:* Versions before 8.32.0 Vulnerable ·gotenberg

Remediation

Fix · CNA gotenberg (gotenberg) Fixed in 8.32.0
Fix · GHSA-chwh-f6gm-r836 github.com/gotenberg/gotenberg/v8 (Go) Fixed in 8.32.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-42595
2026-10-03 Alias added: GHSA-chwh-f6gm-r836

References

TI-2026-30869 Gotenberg: Unauthenticated RCE via ExifTool Metadata Key Injection CVSS 3.1CRITICAL 9.8
TI-2026-29063 Gotenberg vulnerable to argument injection via newlines in ExifTool metadata values CVSS 3.1CRITICAL 10.0
TI-2026-30876 Gotenberg: Unauthenticated SSRF via default deny-list bypass in downloadFrom and webhook CVSS 3.1CRITICAL 9.4
TI-2026-27588 Gotenberg has a ReDoS via extraHttpHeaders scope feature CVSS 4.0HIGH 8.7
TI-2026-30871 Gotenberg: Server-Side Request Forgery (SSRF) in github.com/gotenberg/gotenberg/v8 CVSS 3.1HIGH 8.2
TI-2026-30870 Gotenberg: ExifTool group-prefix syntax bypasses dangerous-tag blocklist CVSS 3.1HIGH 8.2

See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences