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TI-2026-34284 Aliases CVE-2026-46629GHSA-35wc-cvqg-78fp

Twig: Unbounded formatter memoisation in twig/intl-extra keyed on template-controlled arguments

Priority LOW 25CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-770.

Summary

Twig is a template language for PHP. Prior to 3.26.0, twig/intl-extra memoises IntlDateFormatter and NumberFormatter instances in arrays keyed by template-controlled filter arguments such as locale, pattern, and attrs, allowing a template to allocate many ICU formatter objects that remain pinned for the lifetime of the Twig\Environment. This issue is fixed in version 3.26.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00542 45th percentileScored 2026-11-07
Fix Fixed Twig (twigphp): 3.26.0twig/intl-extra (Packagist): 3.26.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
symfonyTwigbefore 3.26.03.26.0Patch availableCNA
—twig/intl-extra (Packagist)before 3.26.03.26.0Patch availableGHSA-35wc-cvqg-78fp
  • Twig Vendorsymfony Affected before 3.26.0 Fixed in 3.26.0 Patch available CNA
  • twig/intl-extra (Packagist) Vendor— Affected before 3.26.0 Fixed in 3.26.0 Patch available GHSA-35wc-cvqg-78fp

CPE configurations NVD · 1

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

Remediation

  • Fix · CNA Twig (twigphp) Fixed in 3.26.0
  • Fix · GHSA-35wc-cvqg-78fp twig/intl-extra (Packagist) Fixed in 3.26.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-46629
  2. 2026-10-03 Alias added: GHSA-35wc-cvqg-78fp

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