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CVE-2026-46634

Twig: `template_from_string()` escapes a SourcePolicy-driven sandbox via synthesized template name

Published: Jul 14, 2026Updated: Jul 29, 2026 Sources: CVE List NVDCWE-693
9.8CRITICAL
NVD MITRE
EPSS Score
0.4%
Top 65.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-693

Affected Products

symfony
oss-projectaka twig (related), symfony framework
twigLibrary
OSS Libraries / web-framework
twigphp
oss-projectaka twig
TwigLibrary
OSS Libraries / web-framework

Exploitability

Official Patch Available
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References

https://github.com/twigphp/Twig/commit/1cde8f2b62463f85d47995fc25f8241cb409d915
github.com
https://github.com/twigphp/Twig/releases/tag/v3.26.0
github.com
https://github.com/twigphp/Twig/security/advisories/GHSA-24x9-r6q4-q93w
github.com

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