What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-10 · updated 2026-10-26
• Weakness: CWE-601

Description

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 products

• Umbraco-CMS: before 13.14.0; from 14.0.0 before 17.4.0 — fixed in 13.14.0, 17.4.0

How to fix

Upgrade to a fixed version: Umbraco-CMS 13.14.0, 17.4.0. Check the vendor advisory for mitigations.

References

• https://github.com/umbraco/Umbraco-CMS/pull/22561
• https://github.com/umbraco/Umbraco-CMS/pull/22565
• https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-2qjj-h6wp-c7h7

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