CVE-2026-46635: twig Auth Bypass — Fix

Description

Twig is a template language for PHP. Prior to 3.26.0, the column filter passes object arrays to PHP array_column(), which reads public and magic properties without reaching CoreExtension::getAttribute() or SandboxExtension::checkPropertyAllowed(), allowing an untrusted template author with column in allowedFilters to read properties that are not in the sandbox allowlist. This issue is fixed in version 3.26.0.

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CVSS v3.1 Score

4.3

MEDIUM

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

EPSS — Exploit Prediction

0.0030

Probability of exploitation

0.22%

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-863 Incorrect Authorization

Affected Products

Vendor	Product	Versions
symfony	twig	< 3.26.0

References

Advisories & Patches

https://github.com/twigphp/Twig/commit/f05c5011c25caf17de37614b7e04662022532ac4 https://github.com/twigphp/Twig/security/advisories/GHSA-vcc8-phrv-43wj

Other References

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

Frequently Asked Questions

What is CVE-2026-46635? +

Twig is a template language for PHP. Prior to 3.26.0, the column filter passes object arrays to PHP array_column(), which reads public and magic properties without reaching CoreExtension::getAttribute() or SandboxExtension::checkPropertyAllowed(), allowing an untrusted template author with column in allowedFilters to read properties that are not in the sandbox allowlist. This issue is fixed in version 3.26.0. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2026-46635? +

CVE-2026-46635 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0030, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-46635? +

CVE-2026-46635 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-2026-46635? +

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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