Vulnerability in Symfony Twig
CVE-2026-46634
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 s…
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Symfony Twig
- Twigphp Twig — versions >= 3.9.0, < 3.26.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-46634?
- CVE-2026-46634 is a critical-severity vulnerability in Symfony Twig, classified under Protection Mechanism Failure. CVSS score: 9.8/10. Published 2026-07-14.
- How severe is CVE-2026-46634?
- Critical severity. CVSS v3 base score is 9.8 out of 10.