CVE-2026-115189 Mautic - Server-Side Template Injection

Mautic contains a server-side template injection caused by insufficient sandbox restrictions in Twig theme rendering, letting authenticated users with core:themes:create permission execute arbitrary code on the server, exploit requires authenticated user with theme creation permission.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
View the NVD record ↗

Details

Type
Server-Side Template Injection
Impact
Remote Code Execution, File System Read, File System Write, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
26 October 2026
Updated
27 October 2026
Weakness
CWE-1336

Vendor fix

Update to the latest version with the complete fix for GHSA-9fx4-7cmj-47vg.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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