twigphp Twig up to 3.25.x intl-extra locale/pattern/attrs allocation of resources

Summaryinfo

A vulnerability categorized as problematic has been discovered in twigphp Twig up to 3.25.x. Affected by this issue is some unknown functionality of the component intl-extra. Executing a manipulation of the argument locale/pattern/attrs can lead to allocation of resources. This vulnerability is tracked as CVE-2026-46629. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as problematic was found in twigphp Twig up to 3.25.x. This vulnerability affects an unknown functionality of the component intl-extra. The manipulation of the argument locale/pattern/attrs with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. As an impact it is known to affect availability. CVE summarizes:

Twig is a template language for PHP. Prior to 3.26.0, twig/intl-extra memoises IntlDateFormatter and NumberFormatter instances in arrays keyed by template-controlled filter arguments such as locale, pattern, and attrs, allowing a template to allocate many ICU formatter objects that remain pinned for the lifetime of the Twig\Environment. This issue is fixed in version 3.26.0.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-46629 since 05/15/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

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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