GitHub Advisoryadvisory · Packagist

GHSA-f74w-488g-8x5r Craft CMS: Potential authenticated Remote Code Execution via referrer redirect

HIGH Published 2026-07-06 Modified 2026-07-06 Official page ↗
Aliases
CVE-2026-55794
Ecosystem
Packagist
Packages
craftcms/cms
Severity
High
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
Weaknesses
CWE-94
Reviewed
2026-07-06

Affected packages

• Packagist craftcms/cms: >= 5.9.0, < 5.10.0 → fixed in 5.10.0

Description

Requirements: • Control panel access • Permissions to edit an entry Details Control panel users with the ability to edit entries can execute unsandboxed Twig code via the HTTP Referrer header. The issue happens when a user is saving entries. Strings for a signed redirect URL are being compiled as a Twig template via `renderObjectTemplate()`, and while a sandboxed alternative already exists (`renderSandboxedObjectTemplate()`), it is not used in this case. This signed URL can be specified by users, as it is reflected in the “Referer” HTTP request header, which is under attacker control. This has been fixed in Craft 5.10.0. Affected users should update to that version or higher to get the fix. Resources https://github.com/craftcms/cms/pull/18680

Related

Alias · CVE (1)

  • CVE-2026-55794 Craft CMS is a content management system (CMS). vulnerability

Weakness · CWE (1)

  • CWE-94 Improper Control of Generation of Code weakness

References