CVE-2026-46633: twig Code Injection — Fix

Description

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.

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CVSS v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0064

Probability of exploitation

0.47%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-94 CWE-94

Affected Products

Vendor	Product	Versions
symfony	twig	< 3.26.0

References

Advisories & Patches

https://github.com/twigphp/Twig/commit/679447fa29083043665482ccf7d64372472621b8 https://github.com/twigphp/Twig/commit/e9ff55f6910832428e48a35b2e0748189ad49ae3 https://github.com/twigphp/Twig/security/advisories/GHSA-7p85-w9px-jpjp

Other References

https://github.com/twigphp/Twig/releases/tag/v3.26.0

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-46633? +

CVE-2026-46633 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0064, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-46633? +

CVE-2026-46633 affects products from symfony, specifically: twig. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-46633? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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