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Vulnerability record · CVE-2026-46634 · published 14 July 2026

CVE-2026-46634: Symfony twig vulnerability

Symfony · Twig

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.

7.7 CVSS 4.0 High EPSS 0.62% · top 52.6% CWE-693 · CWE-693
7.7CVSS 4.0 base score
0.62%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
29 Jul 2026Last modified by NVD

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:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/twigphp/Twig/commit/1cde8f2b62463f85d47995fc25f8241cb409d915 Patch
https://github.com/twigphp/Twig/releases/tag/v3.26.0 Release Notes
https://github.com/twigphp/Twig/security/advisories/GHSA-24x9-r6q4-q93w Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-46634), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.