Bug 2528956 (CVE-2026-46636) - CVE-2026-46636 php-twig: Twig: Sandbox bypass allows unauthorized method calls
Summary: CVE-2026-46636 php-twig: Twig: Sandbox bypass allows unauthorized method calls
Keywords:
Status: NEW
Alias: CVE-2026-46636
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2533279
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-04 22:11 UTC by OSIDB Bzimport
Modified: 2026-09-14 18:26 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-09-04 22:11:25 UTC 
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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