twigphp Twig up to 3.26.x SecurityPolicy checkMethodAllowed privileges management

Summaryinfo

A vulnerability was found in twigphp Twig up to 3.26.x. It has been rated as critical. Affected is the function SecurityPolicy::checkMethodAllowed of the component SecurityPolicy. Performing a manipulation results in privileges management. This vulnerability is cataloged as CVE-2026-46636. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in twigphp Twig up to 3.26.x. This affects the function SecurityPolicy::checkMethodAllowed of the component SecurityPolicy. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-46636 since 05/15/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 3.27.0 eliminates this vulnerability.

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Productinfo

Vendor

• twigphp

Name

• Twig

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19
• 3.20
• 3.21
• 3.22
• 3.23
• 3.24
• 3.25
• 3.26

Website

• Product: https://github.com/twigphp/Twig/

CPE 2.3info

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CPE 2.2info

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