CVE-2026-46636
Twig: Sandbox method allowlist bypass via `Markup` subclass
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1336 |
| Vendor | twigphp |
| Product | twig |
| Published | Sep 4, 2026 |
| Last Updated | Sep 8, 2026 |
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Affected Versions
twigphp / Twig
>= 1.0.0, < 3.27.0
References
github.com: https://github.com/twigphp/Twig/security/advisories/GHSA-64jr-qjx4-w2fh security-tracker.debian.org: https://security-tracker.debian.org/tracker/CVE-2026-46636 security-tracker.debian.org: https://security-tracker.debian.org/tracker/DSA-6311-1 symfony.com: https://symfony.com/blog/cve-2026-46636-sandbox-filter-tag-and-function-allow-list-bypass-when-sandbox-state-changes-between-renders github.com: http://github.com/twigphp/Twig/releases/tag/v3.27.0