cvedb.io
CVE-2026-9558
CRITICAL · CVSS 9.9
EPSS exploitation probability: 0%
Published 2026-05-29T11:16:17.980 · Last modified 2026-06-17T11:05:28.947

Summary

A Server-Side Template Injection (SSTI) vulnerability exists in Mautic's theme engine. The platform renders uploaded Twig templates without a sandbox or strict function restrictions. Authenticated users with permissions to create or upload themes can abuse this to execute arbitrary code on the hosting server (Remote Code Execution) or access restricted system files and configuration settings.

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.