What’s Vulnerable › Vulnerabilities

CVE-2026-49981: Twig: Sandbox filter, tag and function allow-list bypass when sandbox state changes between renders for a cached `Template`

• Severity: high (CVSS 8.2 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: 2026-07-14 · updated 2026-10-24
• Weakness: CWE-693

Description

Twig is a template language for PHP. Prior to 3.27.0, the per-template filter, tag, and function allow-list verdict is computed when a Template instance is constructed and can remain cached after sandbox state changes between renders, allowing a later sandboxed render to reuse a template that was originally checked with a different or empty policy. This issue is fixed in version 3.27.0.

Affected products

• twigphp Twig: before 3.27.0 — fixed in 3.27.0

How to fix

Upgrade to a fixed version: twigphp Twig 3.27.0. Check the vendor advisory for mitigations.

References

• https://github.com/twigphp/Twig/commit/23eb6eb1267cb0d303b91eb5cff9b0c559c538a4
• https://github.com/twigphp/Twig/releases/tag/v3.27.0
• https://github.com/twigphp/Twig/security/advisories/GHSA-529h-vh3j-85hq

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