high8.8
CVE-2026-46640
Twig: Arbitrary PHP code execution via `_self.(<string>)` macro-reference compilation
Impact
Twig is a template language for PHP. From 3.15.0 until 3.26.0, _self.(<string>) and import-alias dynamic attribute syntax can concatenate an attacker-controlled string into a MacroReferenceExpression name without identifier validation, causing raw PHP to be emitted into the generated template source and executed at template-load time. This issue is fixed in version 3.26.0.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | twig/twig | >= 3.15.0, < 3.26.0 | 3.26.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Symfony | Twig | from 3.15.0 before 3.26.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-45vw-wh46-2vx8
- https://github.com/twigphp/Twig/security/advisories/GHSA-45vw-wh46-2vx8
- https://github.com/FriendsOfPHP/security-advisories/blob/master/twig/twig/CVE-2026-46640.yaml
- https://symfony.com/cve-2026-46640
- https://github.com/vladko312/extras/blob/main/CVE-2026-46640.py
- https://github.com/twigphp/Twig/commit/324fa60545694fa6abe85ded9befcb82e1066bc2
- https://github.com/twigphp/Twig/releases/tag/v3.26.0