TI-2026-40280 Aliases CVE-2026-55794 GHSA-f74w-488g-8x5r

Craft CMS: Potential authenticated Remote Code Execution via referrer redirect

MEDIUM 40CWE-1336Published 2026-07-01 · Updated 2026-07-02

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-1336.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00412 35th percentileScored 2026-11-07

Fix Fixed cms (craftcms): 5.10.0craftcms/cms (Packagist): 5.10.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Craft CMS	cms	5.9.0 to before 5.10.0	5.10.0	Patch available	CNA
—	craftcms/cms (Packagist)	5.9.0 to before 5.10.0	5.10.0	Patch available	GHSA-f74w-488g-8x5r

cms VendorCraft CMS Affected 5.9.0 to before 5.10.0 Fixed in 5.10.0 Patch available CNA
craftcms/cms (Packagist) Vendor— Affected 5.9.0 to before 5.10.0 Fixed in 5.10.0 Patch available GHSA-f74w-488g-8x5r

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:craftcms:craft_cms::::::::	—	—	Craft CMS

cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:* Versions — — ·Craft CMS

Remediation

Fix · CNA cms (craftcms) Fixed in 5.10.0
Fix · GHSA-f74w-488g-8x5r craftcms/cms (Packagist) Fixed in 5.10.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-55794
2026-10-03 Alias added: GHSA-f74w-488g-8x5r

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-55794

Other 3

TI-2025-23503 Craft CMS Allows Remote Code Execution KEVCVSS 3.1CRITICAL 10.0
TI-2024-37138 RCE when PHP `register_argc_argv` config setting is enabled in craftcms/cms KEVCVSS 4.0CRITICAL 9.3
TI-2025-16994 Potential RCE with a compromised security key in craft/cms KEVCVSS 3.1HIGH 8.1
TI-2025-24595 Craft CMS stores user-provided content in session files KEVCVSS 4.0MEDIUM 6.9
TI-2023-22284 Craft CMS Remote Code Execution vulnerability CVSS 3.1CRITICAL 10.0
TI-2024-25171 Craft CMS up to v3.7.31 was discovered to contain a SQL injection vulnerability via the GraphQL API endpoint. CVSS 3.1CRITICAL 9.8

See all 203 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences