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.

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 terminate the string and inject arbitrary PHP expressions into the compiled cache file. This issue is fixed in version 3.26.0.

Vulnerability class: RCE (Remote Code Execution)

Published 2026-07-14 · last modified 2026-07-16.

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.

EPSS exploit prediction

EPSS: 0.007 (52.2th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Symfony Twig
Twigphp Twig — versions < 3.26.0

Weakness classification (CWE)

CWE-94 — Code Injection

References

github.com/twigphp/Twig/security/advisories/GHSA-7p85-w9px-jpjp (Vendor Advisory)
github.com/twigphp/Twig/commit/679447fa29083043665482ccf7d64372472621b8 (Patch)
github.com/twigphp/Twig/commit/e9ff55f6910832428e48a35b2e0748189ad49ae3 (Patch)
github.com/twigphp/Twig/releases/tag/v3.26.0 (Release Notes)

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.