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TI-2026-34272 Aliases CVE-2026-46616GHSA-2qjj-h6wp-c7h7

Umbraco.Cms: Open Redirect Vulnerability in Surface Controllers

Priority LOW 26CWE-601Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-601.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0018 7th percentileScored 2026-11-07
Fix Fixed Umbraco-CMS (umbraco): 13.14.0, 17.4.0Umbraco.Cms (NuGet): 13.14.0, 17.4.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
umbracoUmbraco-CMSbefore 13.14.0; 17.3.0-rc to before 17.4.013.14.0, 17.4.0Patch availableCNA
—Umbraco.Cms (NuGet)before 13.14.013.14.0Patch availableGHSA-2qjj-h6wp-c7h7
—Umbraco.Cms (NuGet)17.3.0-rc to before 17.4.017.4.0Patch availableGHSA-2qjj-h6wp-c7h7
  • Umbraco-CMS Vendorumbraco Affected before 13.14.0; 17.3.0-rc to before 17.4.0 Fixed in 13.14.0, 17.4.0 Patch available CNA
  • Umbraco.Cms (NuGet) Vendor— Affected before 13.14.0 Fixed in 13.14.0 Patch available GHSA-2qjj-h6wp-c7h7
  • Umbraco.Cms (NuGet) Vendor— Affected 17.3.0-rc to before 17.4.0 Fixed in 17.4.0 Patch available GHSA-2qjj-h6wp-c7h7

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:*before 13.14.0; 14.0.0 to before 17.4.0Vulnerableumbraco
  • cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:* Versions before 13.14.0; 14.0.0 to before 17.4.0 Vulnerable ·umbraco

Remediation

  • Fix · CNA Umbraco-CMS (umbraco) Fixed in 13.14.0, 17.4.0
  • Fix · GHSA-2qjj-h6wp-c7h7 Umbraco.Cms (NuGet) Fixed in 13.14.0 Advisory →
  • Fix · GHSA-2qjj-h6wp-c7h7 Umbraco.Cms (NuGet) Fixed in 17.4.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-46616
  2. 2026-10-03 Alias added: GHSA-2qjj-h6wp-c7h7

References

Patch 2

Advisory 2

Other 1

  • TI-2025-41183 An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute… CVSS 3.1CRITICAL 10.0
  • TI-2012-05477 Umbraco CMS < 4.7.1 codeEditorSave.asmx RCE CVSS 4.0CRITICAL 9.3
  • TI-2021-22392 Umbraco v8.14.1 - 'baseUrl' SSRF CVSS 4.0MEDIUM 6.9
  • TI-2024-36846 A stored cross-site scripting (XSS) vulnerability in Umbraco CMS v14.3.1 allows attackers… CVSS 3.1MEDIUM 6.5
  • TI-2019-15240 Umbraco CMS 4.11.8 through 7.15.10, and 7.12.4, allows Remote Code Execution by… CVSS 3.1HIGH 7.2
  • TI-2020-04738 Cross-site scripting in Umbraco CMS CVSS 3.1MEDIUM 5.4
See all 56 →

Sources

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