RCE in Symfony Twig

CVE-2026-46633

Twig is a template language for PHP. 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 termi…

Vulnerability class: RCE (Remote Code Execution)

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-46633?
CVE-2026-46633 is a critical-severity vulnerability in Symfony Twig, classified under Code Injection. CVSS score: 9.8/10. Published 2026-07-14.
How severe is CVE-2026-46633?
Critical severity. CVSS v3 base score is 9.8 out of 10.