CVE Catalog

CVE-2026-115935

HighCVSS 8.8
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.37%

31th percentile - higher than 31% of all known CVEs

Summary

The app/process-api-response-headers action accepts fake Craft API response headers from any authenticated control panel user; a user with only accessCp can place newline characters in X-Craft-Plugin-Licenses, injecting a new attacker-known CRAFT_SECURITY_KEY into .env and forging a signed redirect with a Twig system() callback.

Risk Assessment

A non-admin control panel user can replace the security key and forge signed requests leading to code execution.

Recommendation

Update Craft CMS to a patched version and restrict accessCp permission to necessary users.

Other vulnerabilities in Craft CMS

See all
Original NVD description (English source)

The app/process-api-response-headers action accepts fake Craft API response headers from any authenticated control panel user. A non-admin user with only accessCp can place newline characters in X-Craft-Plugin-Licenses. Craft passes this value to its .env writer without removing the newlines. This lets the user insert a new attacker-known CRAFT_SECURITY_KEY into .env. After Craft loads that key, the user can forge a signed login redirect containing a Twig system() callback. This is different from the previous report. That report reads the existing key through a Twig sandbox bypass. This report replaces the key through fake API headers and CRLF injection. Fixing either source does not fix the other.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS