Resource exhaustion in Symfony Twig
CVE-2026-46629
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.
EPSS: 0.005 (43.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Symfony Twig
- Twigphp Twig — versions < 3.26.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-46629?
- CVE-2026-46629 is a medium-severity vulnerability in Symfony Twig, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-07-14.
- How severe is CVE-2026-46629?
- Medium severity. CVSS v3 base score is 6.5 out of 10.