Authentication bypass by spoofing in ASP.NET Core allows an authorized attacker to elevate privileges over a network.

Project Subscriptions

Vendors Products
Microsoft Subscribe
Microsoft.aspnetcore.authentication.negotiate Subscribe
Microsoft Visual Studio 2026 Version 18.10 Subscribe
Visual Studio 2022 Subscribe
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-vrrp-6v32-2p8g Microsoft Security Advisory CVE-2026-70179 - ASP.NET Core Elevation of Privilege Vulnerability
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Thu, 15 Oct 2026 13:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Wed, 14 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 13 Oct 2026 19:15:00 +0000

Type Values Removed Values Added
Description Authentication bypass by spoofing in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
Title ASP.NET Core Elevation of Privilege Vulnerability
First Time appeared Microsoft
Microsoft microsoft.aspnetcore.authentication.negotiate
Microsoft microsoft Visual Studio 2026 Version 18.10
Microsoft visual Studio 2022
Weaknesses CWE-290
CPEs cpe:2.3:a:microsoft:microsoft.aspnetcore.authentication.negotiate:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:microsoft_visual_studio_2026_version_18.10:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft microsoft.aspnetcore.authentication.negotiate
Microsoft microsoft Visual Studio 2026 Version 18.10
Microsoft visual Studio 2022
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-10-14T17:53:39.619Z

Reserved: 2026-08-03T23:48:30.859Z

Link: CVE-2026-70179

cve-icon Vulnrichment

Updated: 2026-10-13T20:53:28.977Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-13T19:19:32.170

Modified: 2026-10-14T04:18:32.693

Link: CVE-2026-70179

cve-icon Redhat

Severity : Important

Publid Date: 2026-10-13T17:00:00Z

Links: CVE-2026-70179 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-14T18:15:04Z

Weaknesses