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TI-2026-34286 Aliases CVE-2026-46634GHSA-24x9-r6q4-q93w

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

Priority LOW 37CWE-693Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-693.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00616 49th percentileScored 2026-11-07
Fix Fixed Twig (twigphp): 3.26.0twig/twig (Packagist): 3.26.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
symfonyTwig3.9.0 to before 3.26.03.26.0Patch availableCNA
—twig/twig (Packagist)3.9.0 to before 3.26.03.26.0Patch availableGHSA-24x9-r6q4-q93w
  • Twig Vendorsymfony Affected 3.9.0 to before 3.26.0 Fixed in 3.26.0 Patch available CNA
  • twig/twig (Packagist) Vendor— Affected 3.9.0 to before 3.26.0 Fixed in 3.26.0 Patch available GHSA-24x9-r6q4-q93w

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:symfony:twig:*:*:*:*:*:*:*:*3.9.0 to before 3.26.0Vulnerablesymfony
  • cpe:2.3:a:symfony:twig:*:*:*:*:*:*:*:* Versions 3.9.0 to before 3.26.0 Vulnerable ·symfony

Remediation

  • Fix · CNA Twig (twigphp) Fixed in 3.26.0
  • Fix · GHSA-24x9-r6q4-q93w twig/twig (Packagist) Fixed in 3.26.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-46634
  2. 2026-10-03 Alias added: GHSA-24x9-r6q4-q93w

References

Patch 1

Advisory 1

Other 4

  • TI-2026-34283 Twig: The `spaceless` filter implicitly marks its output as safe CVSS 4.0MEDIUM 5.1
  • TI-2022-07667 Code injection in Twig CVSS 3.1CRITICAL 9.8
  • TI-2018-10028 Twig before 2.4.4 allows Server-Side Template Injection (SSTI) via the search search_key… CVSS 3.0CRITICAL 9.8
  • TI-2022-18637 Twig may load a template outside a configured directory when using the filesystem loader CVSS 3.1HIGH 7.5
  • TI-2026-34292 Twig: Arbitrary PHP code execution via `_self.(<string>)` macro-reference compilation CVSS 4.0HIGH 8.7
  • TI-2026-34285 Twig: PHP code injection via `{% use %}` template name CVSS 4.0HIGH 8.7
See all 24 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences