CVE-2024-51755: Unguarded calls to __isset() and to array-accesses when the sandbox is enabled in Twig

Severity: low (CVSS 2.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-11-06 · updated 2026-06-17
Weakness: CWE-668

Description

Twig is a template language for PHP. In a sandbox, an attacker can access attributes of Array-like objects as they were not checked by the security policy. They are now checked via the property policy and the `__isset()` method is now called after the security check. This is a BC break. This issue has been patched in versions 3.11.2 and 3.14.1. All users are advised to upgrade. There are no known workarounds for this issue.

Affected products

twigphp Twig: before 3.11.2; from 3.12.0, < 3.14.1

References

https://github.com/twigphp/Twig/commit/831c148e786178e5f2fde9db67266be3bf241c21
https://github.com/twigphp/Twig/security/advisories/GHSA-jjxq-ff2g-95vh

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