HIGH 8.7 NVD
CVE-2026-46636
Twig is a template language for PHP. From version 1.0.0 to before version 3.27.0, SecurityPolicy::checkMethodAllowed() unconditionally whitelists all method cal
Twig is a template language for PHP. From version 1.0.0 to before version 3.27.0, SecurityPolicy::checkMethodAllowed() unconditionally whitelists all method calls on instances of Twig\Markup. Twig\Markup is not final, so subclasses inherit the bypass. An application that passes an object of a Markup-derived class into a sandboxed template (typically to mark a chunk of HTML as safe) inadvertently exposes every public method of that subclass to template authors, regardless of the configured allowedMethods list. This issue has been patched in version 3.27.0.
References
- http://github.com/twigphp/Twig/releases/tag/v3.27.0
- https://github.com/twigphp/Twig/security/advisories/GHSA-64jr-qjx4-w2fh
- https://security-tracker.debian.org/tracker/CVE-2026-46636
- https://security-tracker.debian.org/tracker/DSA-6311-1
- https://symfony.com/blog/cve-2026-46636-sandbox-filter-tag-and-function-allow-list-bypass-
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-09-04 via NVD.
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