CVE-2024-51754: Unguarded calls to __toString() when nesting an object into an array 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 call `__toString()` on an object even if the `__toString()` method is not allowed by the security policy when the object is part of an array or an argument list (arguments to a function or a filter for instance). 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/2bb8c2460a2c519c498df9b643d5277117155a73
https://github.com/twigphp/Twig/security/advisories/GHSA-6377-hfv9-hqf6
https://lists.debian.org/debian-lts-announce/2025/05/msg00039.html

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