CVE-2026-46636

    Dashboard / Vulnerabilities / CVE-2026-46636

    CVE-2026-46636

    Published: 4 Sept 2026Last Modified: 27 Sept 2026

    Summary: Twig: Sandbox method allowlist bypass via `Markup` subclass

    Details: 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.

    References: http://github.com/twigphp/Twig/releases/tag/v3.27.0, https://security-tracker.debian.org/tracker/CVE-2026-46636, https://security-tracker.debian.org/tracker/DSA-6311-1, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46636.json, https://github.com/twigphp/Twig/security/advisories/GHSA-64jr-qjx4-w2fh, https://nvd.nist.gov/vuln/detail/CVE-2026-46636, https://symfony.com/blog/cve-2026-46636-sandbox-filter-tag-and-function-allow-list-bypass-when-sandbox-state-changes-between-renders

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 2f106a80cc13b4260074e573fa017a770fe20350
    Fixed -04ae1bfe9463c816cf72ca0abe7eae2c77a9a9ed

    Affected versions

    v3.26.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-46636 | CVE-DB