Twig is a template language for PHP. Prior to 3.26.0, the deprecated spaceless filter is registered as safe for HTML, causing Twig autoescaping to emit attacker-controlled markup unescaped when spaceless is applied to untrusted input. This issue is fixed in version 3.26.0.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/twigphp/Twig/commit/3190b9ae12614dfd58cc5d8f394bac4708b17913 Patch
- https://github.com/twigphp/Twig/security/advisories/GHSA-4j38-f5cw-54h7 Vendor Advisory
- https://github.com/twigphp/Twig/security/advisories/GHSA-4j38-f5cw-54h7 Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.1 · symfonyNVD modified 2026-10-24 22:10
Affected (CPE criteria) 1
cpe:2.3:a:symfony:twig:*:*:*:*:*:*:*:*
References 4
- https://github.com/twigphp/Twig/commit/3190b9ae12614dfd58cc5d8f394bac4708b17913 Patch
- https://github.com/twigphp/Twig/releases/tag/v3.26.0 Release Notes
- https://github.com/twigphp/Twig/security/advisories/GHSA-4j38-f5cw-54h7 Vendor Advisory
- https://github.com/twigphp/Twig/security/advisories/GHSA-4j38-f5cw-54h7 Vendor Advisory