CVE-2026-42596
9.4 · CRITICALOverview
CVE-2026-42596 is a critical-severity vulnerability affecting thecodingmachine gotenberg. It was published on May 14, 2026 and has a CVSS 3.1 base score of 9.4 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.4, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from thecodingmachine. Update gotenberg to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| thecodingmachine | gotenberg | >= 0, < 8.31.0 | Affected |
Frequently Asked Questions
What is CVE-2026-42596?
CVE-2026-42596 is a critical-severity vulnerability affecting thecodingmachine gotenberg. It was published on May 14, 2026 and has a CVSS 3.1 base score of 9.4 (CRITICAL).
How severe is CVE-2026-42596?
This vulnerability has a CVSS 3.1 base score of 9.4, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-42596?
Check the references section for vendor advisories and patches from thecodingmachine. Update gotenberg to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-42596?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-42596 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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