High 8.7Published Sep 4, 2026

CVE-2026-46636Twig: Sandbox method allowlist bypass via `Markup` subclass

Updated under an hour ago (2026-10-19 07:10 UTC)

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It affects twigphp Twig. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for twigphp Twig

Exploited in the last 30 days

Twig is a template language for PHP. From version 1.0.0 to before version 3.27.0, SecurityPolicy::checkMethodAllowed() unconditionally whitelists all method calls on instances of Twig\Markup. Twig\Markup is not final, so subclasses inherit the bypass. An application that passes an object of a Markup-derived class into a sandboxed template (typically to mark a chunk of HTML as safe) inadvertently exposes every public method of that subclass to template authors, regardless of the configured allowedMethods list. This issue has been patched in version 3.27.0.

CVSS: 8.7 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-1336
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Sep 8, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

twigphp Twig twigphp:twig (from the name)	from 1.0.0, < 3.27.0	CNA record

References

https://github.com/twigphp/Twig/security/advisories/GHSA-64jr-qjx4-w2fhx-refsource-confirm
https://security-tracker.debian.org/tracker/CVE-2026-46636x-refsource-misc
https://security-tracker.debian.org/tracker/DSA-6311-1x-refsource-misc
https://symfony.com/blog/cve-2026-46636-sandbox-filter-tag-and-function-allow-list-bypass-when-sandbox-state-changes-between-rendersx-refsource-misc
http://github.com/twigphp/Twig/releases/tag/v3.27.0x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.