Description
Twig is a template language for PHP. Starting in 1.15.1 and prior to 3.26.0, Compiler::string() does not escape single quotes when a template name from a {% use %} tag is placed inside a PHP single-quoted string literal, allowing a crafted template name to terminate the string and inject arbitrary PHP expressions into the compiled cache file. This issue is fixed in version 3.26.0.
Affected products
symfony: twig
References8
- github.com/twigphp/Twig/security/advisories/GHSA-7p85-w9px-jpjp Vendor Advisory
- github.com/twigphp/Twig/commit/679447fa29083043665482ccf7d64372… Patch
- github.com/twigphp/Twig/commit/e9ff55f6910832428e48a35b2e074818… Patch
- gist.github.com/vladko312/d61b950f168c791db4786b83dc7a81e6
- github.com/FriendsOfPHP/security-advisories/blob/master/twig/tw…
- github.com/twigphp/Twig/commit/a2c6db7ea7d2c90923e6708019ec1442…
- github.com/twigphp/Twig/releases/tag/v3.26.0 Release Notes
- symfony.com/cve-2026-46633
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 4.0
-
8.7
HIGH
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 1% percentile: 56 · as of 15 November 2026
- CWE
- CWE-94
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.