CVE-2026-72782
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 eleme…
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | craftcms/cms | >= 5.0.0-RC1, < 5.10.6 | 5.10.6 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-596p-6jv8-775v
- https://github.com/craftcms/cms/security/advisories/GHSA-596p-6jv8-775v
- https://github.com/craftcms/cms/releases/tag/4.18.2
- https://github.com/craftcms/cms/releases/tag/5.10.6
- https://nvd.nist.gov/vuln/detail/CVE-2026-72782
- https://www.vulncheck.com/advisories/craft-cms-rc1-before-environment-variable-leak