High severityOSV Advisory· Published Sep 4, 2026· Updated Sep 8, 2026
CVE-2026-46636
CVE-2026-46636
Description
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.
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Affected products
2Patches
Vulnerability mechanics
References
5- github.com/twigphp/Twig/releases/tag/v3.27.0nvd
- github.com/twigphp/Twig/security/advisories/GHSA-64jr-qjx4-w2fhnvd
- security-tracker.debian.org/tracker/CVE-2026-46636nvd
- security-tracker.debian.org/tracker/DSA-6311-1nvd
- symfony.com/blog/cve-2026-46636-sandbox-filter-tag-and-function-allow-list-bypass-when-sandbox-state-changes-between-rendersnvd
News mentions
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