Umbraco.Cms: Open Redirect Vulnerability in Surface Controllers
CVE-2026-46616

5.4MEDIUM

Key Information:

Vendor

Umbraco

Status
Umbraco-cms
Vendor
CVE Published:
10 June 2026

What is CVE-2026-46616?

Umbraco is an ASP.NET CMS. Prior to versions 13.14.0 and 17.4.0, some of the Surface Controllers in the CMS provide to support member related operations fail to validate redirect URLs, making Razor templates that derive 'RedirectUrl' from user-controlled query parameters vulnerable to malicious redirect attacks. This issue has been patched in versions 13.14.0 and 17.4.0.

Affected Version(s)

Umbraco-CMS < 13.14.0 < 13.14.0

Umbraco-CMS >= 17.3.0-rc, < 17.4.0 < 17.3.0-rc, 17.4.0

References

https://github.com/umbraco/Umbraco-CMS/security/advisorie...
x_refsource_CONFIRM
https://github.com/umbraco/Umbraco-CMS/pull/22561
x_refsource_MISC
https://github.com/umbraco/Umbraco-CMS/pull/22565
x_refsource_MISC

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.