CVE-2026-46634
Critical
Description
Twig is a template language for PHP. From 3.9.0 until 3.26.0, template_from_string() compiles an inner template under a synthesized __string_template__<hash> name that can fall outside a SourcePolicyInterface sandbox decision, allowing a sandboxed template that can call template_from_string and include to render an inner template without security policy enforcement. This issue is fixed in version 3.26.0.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Symfony Twig
PublishedJul 14, 2026
First seenJul 14, 2026
Weakness typeCWE-693CWE-693
How to fix
Update
- symfony twig3.26.0 or later
- twig/twig3.26.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| symfony twig | 3.9.0 ≤ v < 3.26.0 | 3.26.0 |
| twig/twigPackagist | 3.9.0 ≤ v < 3.26.0 | 3.26.0 |
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