CVE-2026-115935 Craft CMS - CRLF Injection & Remote Code Execution

Craft CMS allows authenticated non-admin users with accessCp to inject newline characters in X-Craft-Plugin-Licenses header, causing CRLF injection in .env writer, letting attackers forge signed login redirects with Twig system() calls.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.68% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
CRLF Injection
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
23 October 2026
Updated
25 October 2026
Weakness
CWE-94

Vendor fix

Update to the latest Craft CMS version with fixes for CRLF injection in API response headers.

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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