Vulnerability Report

CVE-2026-42591

Title: SSRF Bypass in LibreOffice Conversion Endpoint

SSRF

Proof Of Concept

No public PoC currently indexed for CVE-2026-42591.

CWE Category CWE-918

Published Date May 14, 2026

Modified Date May 18, 2026

Exploit Status Not Found

Score 8.2 CVSS v3.1

Exploit Probability (EPSS)

0.25%

Vulnerability Summary

CVE-2026-42591: Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.32.0, the LibreOffice conversion endpoint (/forms/libreoffice/convert) passes uploaded documents directly to LibreOffice without inspecting their content. LibreOffice then fetches any embedded external URLs on its own, completely bypassing the SSRF filters. This vulnerability is fixed in 8.32.0.

Impacted Vendors

thecodingmachine 1

Reference Links

https://github.com/gotenberg/gotenberg/security/advisories/GHSA-rm4c-xj6x-49mw

CVSS v3.1

Source Entity [email protected]

Severity HIGH

8.2

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-42591 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

May 18, 2026 MODIFIED

Vulnerability data updated via NVD.

May 14, 2026 MODIFIED

Vulnerability data updated via NVD.

May 14, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Affected Stack

No specific products linked.