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CVE-2026-46634Twig: `template_from_string()` escapes a SourcePolicy-driven sandbox via synthesized template name
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 HIGHEPSS 0.61%Not in KEVNVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 7.7 | HIGH | 4.0GitHub_M (CNA) | 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 |
| 9.8 | CRITICAL | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Details
- CVE ID
- CVE-2026-46634
- Status
- Analyzed
- Assigner (CNA)
- GitHub_M
- Published
- Jul 14, 2026
- Last modified
- 2026-10-24 22:10 UTC
- Weaknesses
- CWE-693 · Protection Mechanism Failure
Affected Products
As published by the CNA in the CVE record.
twigphpTwig1 version range
- >= 3.9.0, < 3.26.0