medium5.4
CVE-2026-46628
Twig: The `spaceless` filter implicitly marks its output as safe
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | twig/twig | < 3.26.0 | 3.26.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Symfony | Twig | before 3.26.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-4j38-f5cw-54h7
- https://github.com/twigphp/Twig/security/advisories/GHSA-4j38-f5cw-54h7
- https://github.com/FriendsOfPHP/security-advisories/blob/master/twig/twig/CVE-2026-46628.yaml
- https://symfony.com/cve-2026-46628
- https://github.com/twigphp/Twig/commit/3190b9ae12614dfd58cc5d8f394bac4708b17913
- https://github.com/twigphp/Twig/releases/tag/v3.26.0