Executive Summary

Gotenberg is an API for converting document formats. In 8.29.1 and earlier, Gotenberg uses dlclark/regexp2 to compile user-supplied scope patterns without setting a proper timeout. Users with access to features using this logic can hang workers indefinitely.

Why It Matters

CVE-2026-35458 is rated CRITICAL severity, requiring immediate attention from security teams.

CVSS Base Score: 9.8/10

EPSS (Exploit Prediction): 0.1% probability of exploitation in the next 30 days.

Affected Technologies

Vendors: thecodingmachine

Products: gotenberg

🛡️What Defenders Should Check

Check if you are affected — Review your asset inventory for products listed in CVE-2026-35458.

Apply available patches — Visit vendor advisories for the latest security updates.

Monitor for exploitation — Check your SIEM/IDS logs for related indicators.

Use Vulnios to continuously monitor your exposure to CVE-2026-35458 and similar vulnerabilities.

References & Sources

https://github.com/gotenberg/gotenberg/security/advisories/GHSA-fmwg-qcqh-m992

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Affected Products

gotenberg

Sources

NVD / NIST

critical

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Critical Vulnerability: CVE-2026-35458 — thecodingmachine — gotenberg