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CVE-2026-55794

Craft CMS: Potential authenticated Remote Code Execution via referrer redirect

HIGH
8.7
CVSS Score
Published: July 1, 2026 at 11:26 PM UTC
Updated: October 25, 2026 at 09:10 PM UTC
1 product affected across 1 vendorCraftcms

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Severity
HIGH8.7
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Craftcms· Craftcmscomposer
90%
>= 5.9.0, < 5.10.0
Affected range stops below 5.10.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

x_refsource_CONFIRM
Source: cverecord
https://github.com/craftcms/cms/security/advisories/GHSA-f74w-488g-8x5r
x_refsource_MISC
Source: cverecord
https://github.com/craftcms/cms/pull/18680

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-1336CWE-94

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