Vulnerability Description
Craft CMS versions >= 5.0.0-RC1 before 5.10.6 and >= 4.0.0-RC1 before 4.18.2 interpolate environment variables and secrets (via ${ENV_VAR} strings in the elementId parameter) into Twig templates before rendering, even when the Twig sandbox is enabled. An authenticated attacker with control panel access can render a malicious sandboxed Twig template and, using a blind error-based technique across many requests, incrementally leak arbitrary environment variables and secrets. These can be abused to forge sessions (via CRAFT_SECURITY_KEY), escalate privileges, and steal database, SMTP, API, or blob storage credentials. Fixed in 5.10.6 and 4.18.2.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/craftcms/cms/security/advisories/GHSA-596p-6jv8-775v
- https://www.vulncheck.com/advisories/craft-cms-rc1-before-environment-variable-l
FAQ
What is CVE-2026-72782?
CVE-2026-72782 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Craft CMS versions >= 5.0.0-RC1 before 5.10.6 and >= 4.0.0-RC1 before 4.18.2 interpolate environment variables and secrets (via ${ENV_VAR} strings in the elementId parameter) into Twig templates befor...
How severe is CVE-2026-72782?
CVE-2026-72782 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-72782?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.