Critical severity · published Jul 14, 2026
CVE-2026-46634
Twig: `template_from_string()` escapes a SourcePolicy-driven sandbox via synthesized template name
9.8
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TW
Twig · twigphp
>= 3.9.0, < 3.26.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46634
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-46634
Patch
https://github.com/twigphp/Twig/commit/1cde8f2b62463f85d47995fc25f8241cb409d915
Release Notes
https://github.com/twigphp/Twig/releases/tag/v3.26.0
Vendor Advisory
https://github.com/twigphp/Twig/security/advisories/GHSA-24x9-r6q4-q93w
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