Twig is a template language for PHP. Prior to 3.26.0, {% sandbox %}{% include %} can include a template that was previously loaded outside the sandbox without re-invoking checkSecurity(), allowing the cached template to use tags, filters, and functions that should have been denied by SecurityPolicy::checkSecurity(). This issue is fixed in version 3.26.0.
https://github.com/twigphp/Twig/security/advisories/GHSA-7fxw-r6jv-74c8
https://github.com/twigphp/Twig/releases/tag/v3.26.0
https://github.com/twigphp/Twig/commit/819c6a89fe0f261b8555c4f4d5e27d31984223ea
Published: 2026-07-14
Updated: 2026-07-16
Base Score: 8.5
Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:N
Severity: High
Base Score: 8.1
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Severity: High
Base Score: 6
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
Severity: Medium
EPSS: 0.00066