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TI-2026-30873 Aliases CVE-2026-42593GHSA-3cv5-q585-h563

Gotenberg: Arbitrary PDF read via stampExpression and watermarkExpression in merge, split, and convert routes

Priority MEDIUM 63CWE-22Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-22 and the CVSS impact.

Summary

Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.32.0, pdfengines/merge, pdfengines/split, libreoffice/convert, chromium/convert/url, chromium/convert/html, and chromium/convert/markdown accept stampSource=pdf + stampExpression=/path and watermarkSource=pdf + watermarkExpression=/path from anonymous callers. The dedicated stamp/watermark routes require an uploaded file when the source type is image or pdf; these six routes only overwrite the expression when a file is uploaded, leaving the user-controlled path intact when no file is attached. pdfcpu opens the path and composites its pages onto the output PDF, which returns to the caller. An attacker reads any PDF the Gotenberg process can access on the container filesystem. This vulnerability is fixed in 8.32.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00311 24th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed gotenberg (gotenberg): 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

VendorProductAffected versionsFixed inStatusSource
gotenberggotenbergbefore 8.32.08.32.0Patch availableCNA
—github.com/gotenberg/gotenberg/v8 (Go)up to 8.31.0—No fix listedGHSA-3cv5-q585-h563
  • gotenberg Vendorgotenberg Affected before 8.32.0 Fixed in 8.32.0 Patch available CNA
  • github.com/gotenberg/gotenberg/v8 (Go) Vendor— Affected up to 8.31.0 Fixed in — No fix listed GHSA-3cv5-q585-h563

CPE configurations NVD · 1

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

Remediation

  • Fix · CNA gotenberg (gotenberg) Fixed in 8.32.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-42593
  2. 2026-10-03 Alias added: GHSA-3cv5-q585-h563

References

Exploit 1

Advisory 1

Other 1

  • 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-2026-30875 Gotenberg: Server-Side Request Forgery via Chromium URL Endpoint with Redirect-Based Deny-List Bypass CVSS 3.1HIGH 8.6
  • TI-2026-30871 Gotenberg: Server-Side Request Forgery (SSRF) in github.com/gotenberg/gotenberg/v8 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