Is CVE-2026-42596 actively exploited?

No active exploitation of CVE-2026-42596 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-42596 be exploited remotely?

Yes. CVE-2026-42596 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-42596?

CVE-2026-42596 has a CVSS score of 9.4 (CRITICAL).

HOME VULNERABILITIESCVE-2026-42596

CRITICAL

CVE-2026-42596

CWE-918Published: May 14, 2026· Updated: May 18, 2026

9.4

CVSS v3.1

EPSS:0.07%probability of exploitation in 30 daysPercentile:21.2th

Official Description

Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.31.0, the default deny-lists used by Gotenberg's downloadFrom feature and webhook feature are bypassable. Because the filter is regex-based and case-sensitive, an unauthenticated attacker can supply URLs such as http://[::ffff:127.0.0.1]:... and reach loopback or private HTTP services that the default deny-list is intended to block. This crosses a real security boundary because an external caller can force the server to make outbound requests to internal-only targets. This vulnerability is fixed in 8.31.0.

NVD Source

Technical Analysis

CVE-2026-42596 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 9.4.