CVE-2026-9558 — No title supplied

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Not supplied / Not supplied	affected 1.3.0 before 4.4.20; affected 5.0.0 before 5.2.11; affected 6.0.0 before 6.0.9; affected 7.0.0 before 7.1.2

CWE

CWE-1336

References

https://github.com/mautic/mautic/security/advisories/GHSA-9fx4-7cmj-47vg

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.