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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.

PUBLISHED Reserved 2026-05-15 | Published 2026-07-14 | Updated 2026-07-14 | Assigner GitHub_M




HIGH: 7.7CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-693: Protection Mechanism Failure

Product status

>= 3.9.0, < 3.26.0
affected

References

github.com/...p/Twig/security/advisories/GHSA-24x9-r6q4-q93w

github.com/...ommit/1cde8f2b62463f85d47995fc25f8241cb409d915

github.com/twigphp/Twig/releases/tag/v3.26.0

cve.org (CVE-2026-46634)

nvd.nist.gov (CVE-2026-46634)

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