Vulnerability · Published Jul 14, 2026 · Assigned by GitHub_M
CVE-2026-49981Twig: Sandbox filter, tag and function allow-list bypass when sandbox state changes between renders for a cached `Template`
Medium 6.0
In plain English
A medium-severity incorrect authorization in Twig from twigphp. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Twig is a template language for PHP. Prior to 3.27.0, the per-template filter, tag, and function allow-list verdict is computed when a Template instance is constructed and can remain cached after sandbox state changes between renders, allowing a later sandboxed render to reuse a template that was originally checked with a different or empty policy. This issue is fixed in version 3.27.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | php-twig | no fix listed | DEBIAN-CVE-2026-49981 |
| Debian:13 | php-twig | 3.27.0-0+deb13u1 | DEBIAN-CVE-2026-49981 |
| Debian:14 | php-twig | 3.27.0-1 | DEBIAN-CVE-2026-49981 |
| Packagist | twig/twig | 3.27.0 | GHSA-529h-vh3j-85hq |
| Ubuntu:26.10 | php-twig | no fix listed | UBUNTU-CVE-2026-49981 |
Affected products (as reported)
Weakness: CWE-693, CWE-863 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/twigphp/Twig/security/advisories/GHSA-529h-vh3j-85hq x_refsource_CONFIRM
- https://github.com/twigphp/Twig/commit/23eb6eb1267cb0d303b91eb5cff9b0c559c538a4 x_refsource_MISC
- https://github.com/twigphp/Twig/releases/tag/v3.27.0 x_refsource_MISC