twigphp Twig up to 3.25.x Compiler Compiler::string Template Name escape output

Summaryinfo

A vulnerability was found in twigphp Twig up to 3.25.x. It has been declared as critical. Affected is the function Compiler::string of the component Compiler. Such manipulation of the argument Template Name leads to escape output. This vulnerability is referenced as CVE-2026-46633. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in twigphp Twig up to 3.25.x. It has been rated as critical. Affected by this issue is the function Compiler::string of the component Compiler. The manipulation of the argument Template Name with an unknown input leads to a escape output vulnerability. Using CWE to declare the problem leads to CWE-116. The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Twig is a template language for PHP. Prior to 3.26.0, Compiler::string() does not escape single quotes when a template name from a {% use %} tag is placed inside a PHP single-quoted string literal, allowing a crafted template name to terminate the string and inject arbitrary PHP expressions into the compiled cache file. This issue is fixed in version 3.26.0.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-46633 since 05/15/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Upgrading to version 3.26.0 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

Website

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

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