CVE-2026-46634
CRITICALTwig: `template_from_string()` escapes a SourcePolicy-driven sandbox via synthesized template name
Title source: cnaDescription
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.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/twigphp/Twig/security/advisories/GHSA-24x9-r6q4-q93w
X_Refsource_Misc x_refsource_misc
https://github.com/twigphp/Twig/commit/1cde8f2b62463f85d47995fc25f8241cb409d915
X_Refsource_Misc x_refsource_misc
https://github.com/twigphp/Twig/releases/tag/v3.26.0
Scores
CVSS v3
9.8
EPSS
0.0042
EPSS Percentile
34.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-693
Status
published
Products (2)
symfony/twig
3.9.0 - 3.26.0
twigphp/Twig
>= 3.9.0, < 3.26.0
Published
Jul 14, 2026
Tracked Since
Jul 15, 2026