CVE-2026-55794

Craft CMS: Potential authenticated Remote Code Execution via referrer redirect

State: Published
Severity: 8.7 High
Published: Jul 1, 2026
Updated: Jul 2, 2026
Reserved: Jun 17, 2026

Description

Craft CMS is a content management system (CMS). In versions 5.9.0 and above prior to 5.10.0, control panel users with the ability to edit entries can execute unsandboxed Twig code via the HTTP Referrer header, potentially leading to authenticated RCE. 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 issue has been fixed in version 5.10.0.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	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	GitHub_M

Weaknesses

CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine
CWE-94 Improper Control of Generation of Code ('Code Injection')

Affected Products

Product	Versions
cmscraftcms	>= 5.9.0, < 5.10.0Affected

References

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