CVE-2026-46636 (GCVE-0-2026-46636)
Vulnerability from cvelistv5 – Published: 2026-09-04 22:07 – Updated: 2026-09-08 17:38
VLAI
EPSS
VEX
Title
Twig: Sandbox method allowlist bypass via `Markup` subclass
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 17:37 UTC
CWE
- CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/twigphp/Twig/security/advisori… | x_refsource_CONFIRM |
| https://security-tracker.debian.org/tracker/CVE-2… | x_refsource_MISC |
| https://security-tracker.debian.org/tracker/DSA-6311-1 | x_refsource_MISC |
| https://symfony.com/blog/cve-2026-46636-sandbox-f… | x_refsource_MISC |
| http://github.com/twigphp/Twig/releases/tag/v3.27.0 | x_refsource_MISC |
Impacted products
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