Vulnerability · Published Oct 13, 2026 · Assigned by microsoft
CVE-2026-70179ASP.NET Core Elevation of Privilege Vulnerability
High 7.5
In plain English
A high-severity authentication bypass by spoofing in Microsoft.AspNetCore.Authentication.Negotiate from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.6%top 49.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Authentication bypass by spoofing in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | aspnetcore-runtime-10.0 | 10.0.13-1.el10_2 | ALSA-2026:86195 |
| AlmaLinux:8 | aspnetcore-runtime-10.0 | 10.0.13-1.el8_10 | ALSA-2026:86192 |
| AlmaLinux:9 | aspnetcore-runtime-10.0 | 10.0.13-1.el9_8 | ALSA-2026:86193 |
| AlmaLinux:10 | aspnetcore-runtime-8.0 | 8.0.32-1.el10_2 | ALSA-2026:86168 |
| AlmaLinux:8 | aspnetcore-runtime-8.0 | 8.0.32-2.el8_10 | ALSA-2026:86594 |
| AlmaLinux:9 | aspnetcore-runtime-8.0 | 8.0.32-1.el9_8 | ALSA-2026:86169 |
| AlmaLinux:10 | aspnetcore-runtime-9.0 | 9.0.21-1.el10_2 | ALSA-2026:86172 |
| AlmaLinux:8 | aspnetcore-runtime-9.0 | 9.0.21-1.el8_10 | ALSA-2026:86170 |
| AlmaLinux:9 | aspnetcore-runtime-9.0 | 9.0.21-1.el9_8 | ALSA-2026:86171 |
| AlmaLinux:10 | aspnetcore-runtime-dbg-10.0 | 10.0.13-1.el10_2 | ALSA-2026:86195 |
| AlmaLinux:8 | aspnetcore-runtime-dbg-10.0 | 10.0.13-1.el8_10 | ALSA-2026:86192 |
| AlmaLinux:9 | aspnetcore-runtime-dbg-10.0 | 10.0.13-1.el9_8 | ALSA-2026:86193 |
| AlmaLinux:10 | aspnetcore-runtime-dbg-8.0 | 8.0.32-1.el10_2 | ALSA-2026:86168 |
| AlmaLinux:8 | aspnetcore-runtime-dbg-8.0 | 8.0.32-2.el8_10 | ALSA-2026:86594 |
| AlmaLinux:9 | aspnetcore-runtime-dbg-8.0 | 8.0.32-1.el9_8 | ALSA-2026:86169 |
| AlmaLinux:10 | aspnetcore-runtime-dbg-9.0 | 9.0.21-1.el10_2 | ALSA-2026:86172 |
| AlmaLinux:8 | aspnetcore-runtime-dbg-9.0 | 9.0.21-1.el8_10 | ALSA-2026:86170 |
| AlmaLinux:9 | aspnetcore-runtime-dbg-9.0 | 9.0.21-1.el9_8 | ALSA-2026:86171 |
| AlmaLinux:10 | aspnetcore-targeting-pack-10.0 | 10.0.13-1.el10_2 | ALSA-2026:86195 |
| AlmaLinux:8 | aspnetcore-targeting-pack-10.0 | 10.0.13-1.el8_10 | ALSA-2026:86192 |
| AlmaLinux:9 | aspnetcore-targeting-pack-10.0 | 10.0.13-1.el9_8 | ALSA-2026:86193 |
| AlmaLinux:10 | aspnetcore-targeting-pack-8.0 | 8.0.32-1.el10_2 | ALSA-2026:86168 |
| AlmaLinux:8 | aspnetcore-targeting-pack-8.0 | 8.0.32-2.el8_10 | ALSA-2026:86594 |
| AlmaLinux:9 | aspnetcore-targeting-pack-8.0 | 8.0.32-1.el9_8 | ALSA-2026:86169 |
| AlmaLinux:10 | aspnetcore-targeting-pack-9.0 | 9.0.21-1.el10_2 | ALSA-2026:86172 |
| AlmaLinux:8 | aspnetcore-targeting-pack-9.0 | 9.0.21-1.el8_10 | ALSA-2026:86170 |
| AlmaLinux:9 | aspnetcore-targeting-pack-9.0 | 9.0.21-1.el9_8 | ALSA-2026:86171 |
| AlmaLinux:8 | dotnet | 10.0.113-1.el8_10 | ALSA-2026:86192 |
| AlmaLinux:10 | dotnet-apphost-pack-10.0 | 10.0.13-1.el10_2 | ALSA-2026:86195 |
| AlmaLinux:8 | dotnet-apphost-pack-10.0 | 10.0.13-1.el8_10 | ALSA-2026:86192 |
| AlmaLinux:9 | dotnet-apphost-pack-10.0 | 10.0.13-1.el9_8 | ALSA-2026:86193 |
| AlmaLinux:10 | dotnet-apphost-pack-8.0 | 8.0.32-1.el10_2 | ALSA-2026:86168 |
| AlmaLinux:8 | dotnet-apphost-pack-8.0 | 8.0.32-2.el8_10 | ALSA-2026:86594 |
| AlmaLinux:9 | dotnet-apphost-pack-8.0 | 8.0.32-1.el9_8 | ALSA-2026:86169 |
| AlmaLinux:10 | dotnet-apphost-pack-9.0 | 9.0.21-1.el10_2 | ALSA-2026:86172 |
| AlmaLinux:8 | dotnet-apphost-pack-9.0 | 9.0.21-1.el8_10 | ALSA-2026:86170 |
| AlmaLinux:9 | dotnet-apphost-pack-9.0 | 9.0.21-1.el9_8 | ALSA-2026:86171 |
| AlmaLinux:10 | dotnet-host | 10.0.13-1.el10_2 | ALSA-2026:86195 |
| AlmaLinux:9 | dotnet-host | 10.0.13-1.el9_8 | ALSA-2026:86193 |
| AlmaLinux:10 | dotnet-hostfxr-10.0 | 10.0.13-1.el10_2 | ALSA-2026:86195 |
| AlmaLinux:8 | dotnet-hostfxr-10.0 | 10.0.13-1.el8_10 | ALSA-2026:86192 |
| AlmaLinux:9 | dotnet-hostfxr-10.0 | 10.0.13-1.el9_8 | ALSA-2026:86193 |
| AlmaLinux:10 | dotnet-hostfxr-8.0 | 8.0.32-1.el10_2 | ALSA-2026:86168 |
| AlmaLinux:8 | dotnet-hostfxr-8.0 | 8.0.32-2.el8_10 | ALSA-2026:86594 |
| AlmaLinux:9 | dotnet-hostfxr-8.0 | 8.0.32-1.el9_8 | ALSA-2026:86169 |
| AlmaLinux:10 | dotnet-hostfxr-9.0 | 9.0.21-1.el10_2 | ALSA-2026:86172 |
| AlmaLinux:8 | dotnet-hostfxr-9.0 | 9.0.21-1.el8_10 | ALSA-2026:86170 |
| AlmaLinux:9 | dotnet-hostfxr-9.0 | 9.0.21-1.el9_8 | ALSA-2026:86171 |
| AlmaLinux:10 | dotnet-runtime-10.0 | 10.0.13-1.el10_2 | ALSA-2026:86195 |
| AlmaLinux:8 | dotnet-runtime-10.0 | 10.0.13-1.el8_10 | ALSA-2026:86192 |
| AlmaLinux:9 | dotnet-runtime-10.0 | 10.0.13-1.el9_8 | ALSA-2026:86193 |
| AlmaLinux:10 | dotnet-runtime-8.0 | 8.0.32-1.el10_2 | ALSA-2026:86168 |
| AlmaLinux:8 | dotnet-runtime-8.0 | 8.0.32-2.el8_10 | ALSA-2026:86594 |
| AlmaLinux:9 | dotnet-runtime-8.0 | 8.0.32-1.el9_8 | ALSA-2026:86169 |
| AlmaLinux:10 | dotnet-runtime-9.0 | 9.0.21-1.el10_2 | ALSA-2026:86172 |
| AlmaLinux:8 | dotnet-runtime-9.0 | 9.0.21-1.el8_10 | ALSA-2026:86170 |
| AlmaLinux:9 | dotnet-runtime-9.0 | 9.0.21-1.el9_8 | ALSA-2026:86171 |
| AlmaLinux:10 | dotnet-runtime-dbg-10.0 | 10.0.13-1.el10_2 | ALSA-2026:86195 |
| AlmaLinux:8 | dotnet-runtime-dbg-10.0 | 10.0.13-1.el8_10 | ALSA-2026:86192 |
| AlmaLinux:9 | dotnet-runtime-dbg-10.0 | 10.0.13-1.el9_8 | ALSA-2026:86193 |
| AlmaLinux:10 | dotnet-runtime-dbg-8.0 | 8.0.32-1.el10_2 | ALSA-2026:86168 |
| AlmaLinux:8 | dotnet-runtime-dbg-8.0 | 8.0.32-2.el8_10 | ALSA-2026:86594 |
| AlmaLinux:9 | dotnet-runtime-dbg-8.0 | 8.0.32-1.el9_8 | ALSA-2026:86169 |
| AlmaLinux:10 | dotnet-runtime-dbg-9.0 | 9.0.21-1.el10_2 | ALSA-2026:86172 |
| AlmaLinux:8 | dotnet-runtime-dbg-9.0 | 9.0.21-1.el8_10 | ALSA-2026:86170 |
| AlmaLinux:9 | dotnet-runtime-dbg-9.0 | 9.0.21-1.el9_8 | ALSA-2026:86171 |
| AlmaLinux:10 | dotnet-sdk-10.0 | 10.0.113-1.el10_2 | ALSA-2026:86195 |
| AlmaLinux:8 | dotnet-sdk-10.0 | 10.0.113-1.el8_10 | ALSA-2026:86192 |
| AlmaLinux:9 | dotnet-sdk-10.0 | 10.0.113-1.el9_8 | ALSA-2026:86193 |
| AlmaLinux:10 | dotnet-sdk-10.0-source-built-artifacts | 10.0.113-1.el10_2 | ALSA-2026:86195 |
| AlmaLinux:8 | dotnet-sdk-10.0-source-built-artifacts | 10.0.113-1.el8_10 | ALSA-2026:86192 |
| AlmaLinux:9 | dotnet-sdk-10.0-source-built-artifacts | 10.0.113-1.el9_8 | ALSA-2026:86193 |
| AlmaLinux:10 | dotnet-sdk-8.0 | 8.0.132-1.el10_2 | ALSA-2026:86168 |
| AlmaLinux:8 | dotnet-sdk-8.0 | 8.0.132-2.el8_10 | ALSA-2026:86594 |
| AlmaLinux:9 | dotnet-sdk-8.0 | 8.0.132-1.el9_8 | ALSA-2026:86169 |
| AlmaLinux:10 | dotnet-sdk-8.0-source-built-artifacts | 8.0.132-1.el10_2 | ALSA-2026:86168 |
| AlmaLinux:8 | dotnet-sdk-8.0-source-built-artifacts | 8.0.132-2.el8_10 | ALSA-2026:86594 |
| AlmaLinux:9 | dotnet-sdk-8.0-source-built-artifacts | 8.0.132-1.el9_8 | ALSA-2026:86169 |
| AlmaLinux:10 | dotnet-sdk-9.0 | 9.0.122-1.el10_2 | ALSA-2026:86172 |
| AlmaLinux:8 | dotnet-sdk-9.0 | 9.0.122-1.el8_10 | ALSA-2026:86170 |
| AlmaLinux:9 | dotnet-sdk-9.0 | 9.0.122-1.el9_8 | ALSA-2026:86171 |
| AlmaLinux:10 | dotnet-sdk-9.0-source-built-artifacts | 9.0.122-1.el10_2 | ALSA-2026:86172 |
| AlmaLinux:8 | dotnet-sdk-9.0-source-built-artifacts | 9.0.122-1.el8_10 | ALSA-2026:86170 |
| AlmaLinux:9 | dotnet-sdk-9.0-source-built-artifacts | 9.0.122-1.el9_8 | ALSA-2026:86171 |
| AlmaLinux:10 | dotnet-sdk-aot-10.0 | 10.0.113-1.el10_2 | ALSA-2026:86195 |
| AlmaLinux:8 | dotnet-sdk-aot-10.0 | 10.0.113-1.el8_10 | ALSA-2026:86192 |
| AlmaLinux:9 | dotnet-sdk-aot-10.0 | 10.0.113-1.el9_8 | ALSA-2026:86193 |
| AlmaLinux:10 | dotnet-sdk-aot-9.0 | 9.0.122-1.el10_2 | ALSA-2026:86172 |
| AlmaLinux:8 | dotnet-sdk-aot-9.0 | 9.0.122-1.el8_10 | ALSA-2026:86170 |
| AlmaLinux:9 | dotnet-sdk-aot-9.0 | 9.0.122-1.el9_8 | ALSA-2026:86171 |
| AlmaLinux:10 | dotnet-sdk-dbg-10.0 | 10.0.113-1.el10_2 | ALSA-2026:86195 |
| AlmaLinux:8 | dotnet-sdk-dbg-10.0 | 10.0.113-1.el8_10 | ALSA-2026:86192 |
| AlmaLinux:9 | dotnet-sdk-dbg-10.0 | 10.0.113-1.el9_8 | ALSA-2026:86193 |
| AlmaLinux:10 | dotnet-sdk-dbg-8.0 | 8.0.132-1.el10_2 | ALSA-2026:86168 |
| AlmaLinux:8 | dotnet-sdk-dbg-8.0 | 8.0.132-2.el8_10 | ALSA-2026:86594 |
| AlmaLinux:9 | dotnet-sdk-dbg-8.0 | 8.0.132-1.el9_8 | ALSA-2026:86169 |
| AlmaLinux:10 | dotnet-sdk-dbg-9.0 | 9.0.122-1.el10_2 | ALSA-2026:86172 |
| AlmaLinux:8 | dotnet-sdk-dbg-9.0 | 9.0.122-1.el8_10 | ALSA-2026:86170 |
| AlmaLinux:9 | dotnet-sdk-dbg-9.0 | 9.0.122-1.el9_8 | ALSA-2026:86171 |
| AlmaLinux:10 | dotnet-targeting-pack-10.0 | 10.0.13-1.el10_2 | ALSA-2026:86195 |
| AlmaLinux:8 | dotnet-targeting-pack-10.0 | 10.0.13-1.el8_10 | ALSA-2026:86192 |
| AlmaLinux:9 | dotnet-targeting-pack-10.0 | 10.0.13-1.el9_8 | ALSA-2026:86193 |
| AlmaLinux:10 | dotnet-targeting-pack-8.0 | 8.0.32-1.el10_2 | ALSA-2026:86168 |
| AlmaLinux:8 | dotnet-targeting-pack-8.0 | 8.0.32-2.el8_10 | ALSA-2026:86594 |
| AlmaLinux:9 | dotnet-targeting-pack-8.0 | 8.0.32-1.el9_8 | ALSA-2026:86169 |
| AlmaLinux:10 | dotnet-targeting-pack-9.0 | 9.0.21-1.el10_2 | ALSA-2026:86172 |
| AlmaLinux:8 | dotnet-targeting-pack-9.0 | 9.0.21-1.el8_10 | ALSA-2026:86170 |
| AlmaLinux:9 | dotnet-targeting-pack-9.0 | 9.0.21-1.el9_8 | ALSA-2026:86171 |
| AlmaLinux:10 | dotnet-templates-10.0 | 10.0.113-1.el10_2 | ALSA-2026:86195 |
| AlmaLinux:8 | dotnet-templates-10.0 | 10.0.113-1.el8_10 | ALSA-2026:86192 |
| AlmaLinux:9 | dotnet-templates-10.0 | 10.0.113-1.el9_8 | ALSA-2026:86193 |
| AlmaLinux:10 | dotnet-templates-8.0 | 8.0.132-1.el10_2 | ALSA-2026:86168 |
| AlmaLinux:8 | dotnet-templates-8.0 | 8.0.132-2.el8_10 | ALSA-2026:86594 |
| AlmaLinux:9 | dotnet-templates-8.0 | 8.0.132-1.el9_8 | ALSA-2026:86169 |
| AlmaLinux:10 | dotnet-templates-9.0 | 9.0.122-1.el10_2 | ALSA-2026:86172 |
| AlmaLinux:8 | dotnet-templates-9.0 | 9.0.122-1.el8_10 | ALSA-2026:86170 |
| AlmaLinux:9 | dotnet-templates-9.0 | 9.0.122-1.el9_8 | ALSA-2026:86171 |
| AlmaLinux:10 | netstandard-targeting-pack-2.1 | 9.0.122-1.el10_2 | ALSA-2026:86172 |
| AlmaLinux:8 | netstandard-targeting-pack-2.1 | 9.0.122-1.el8_10 | ALSA-2026:86170 |
| AlmaLinux:9 | netstandard-targeting-pack-2.1 | 9.0.122-1.el9_8 | ALSA-2026:86171 |
| Alpine:v3.23 | dotnet10-runtime | 10.0.13-r0 | ALPINE-CVE-2026-70179 |
| Alpine:v3.24 | dotnet10-runtime | 10.0.13-r0 | ALPINE-CVE-2026-70179 |
| Alpine:v3.22 | dotnet8-runtime | 8.0.32-r0 | ALPINE-CVE-2026-70179 |
| Alpine:v3.23 | dotnet8-runtime | 8.0.32-r0 | ALPINE-CVE-2026-70179 |
| Alpine:v3.24 | dotnet8-runtime | 8.0.32-r0 | ALPINE-CVE-2026-70179 |
| Alpine:v3.22 | dotnet9-runtime | 9.0.21-r0 | ALPINE-CVE-2026-70179 |
| Alpine:v3.23 | dotnet9-runtime | 9.0.21-r0 | ALPINE-CVE-2026-70179 |
| Alpine:v3.24 | dotnet9-runtime | 9.0.21-r0 | ALPINE-CVE-2026-70179 |
| NuGet | microsoft.aspnetcore.authentication.negotiate | 10.0.13 | GHSA-vrrp-6v32-2p8g |
| NuGet | microsoft.aspnetcore.authentication.negotiate | 8.0.32 | GHSA-vrrp-6v32-2p8g |
| NuGet | microsoft.aspnetcore.authentication.negotiate | 9.0.21 | GHSA-vrrp-6v32-2p8g |
| Rocky Linux:10 | dotnet10.0 | 0:10.0.113-1.el10_2 | RLSA-2026:86195 |
| Rocky Linux:8 | dotnet10.0 | 0:10.0.113-1.el8_10 | RLSA-2026:86192 |
| Rocky Linux:9 | dotnet10.0 | 0:10.0.113-1.el9_8 | RLSA-2026:86193 |
| Rocky Linux:10 | dotnet8.0 | 0:8.0.132-1.el10_2 | RLSA-2026:86168 |
| Rocky Linux:8 | dotnet8.0 | 0:8.0.132-2.el8_10 | RLSA-2026:86594 |
| Rocky Linux:9 | dotnet8.0 | 0:8.0.132-1.el9_8 | RLSA-2026:86169 |
| Rocky Linux:10 | dotnet9.0 | 0:9.0.122-1.el10_2 | RLSA-2026:86172 |
| Rocky Linux:8 | dotnet9.0 | 0:9.0.122-1.el8_10 | RLSA-2026:86170 |
| Rocky Linux:9 | dotnet9.0 | 0:9.0.122-1.el9_8 | RLSA-2026:86171 |
| Ubuntu:24.04:LTS | dotnet10 | 10.0.113-10.0.13-0ubuntu1~24.04.1 | USN-8942-1 |
| Ubuntu:24.04:LTS | dotnet10 | 10.0.113-10.0.13-0ubuntu1~24.04.1 | UBUNTU-CVE-2026-70179 |
| Ubuntu:26.04:LTS | dotnet10 | 10.0.113-10.0.13-0ubuntu1~26.04.1 | UBUNTU-CVE-2026-70179 |
| Ubuntu:26.04:LTS | dotnet10 | 10.0.113-10.0.13-0ubuntu1~26.04.1 | USN-8942-1 |
| Ubuntu:26.10 | dotnet10 | 10.0.113-10.0.13-0ubuntu1~26.10.1 | UBUNTU-CVE-2026-70179 |
| Ubuntu:26.10 | dotnet10 | 10.0.113-10.0.13-0ubuntu1~26.10.1 | USN-8942-1 |
| Ubuntu:26.10 | dotnet11 | 11.0.100-11.0.0~rc2-0ubuntu1~26.10.1 | USN-8942-1 |
| Ubuntu:22.04:LTS | dotnet6 | no fix listed | UBUNTU-CVE-2026-70179 |
| Ubuntu:22.04:LTS | dotnet7 | no fix listed | UBUNTU-CVE-2026-70179 |
| Ubuntu:22.04:LTS | dotnet8 | 8.0.132-8.0.32-0ubuntu1~22.04.1 | UBUNTU-CVE-2026-70179 |
| Ubuntu:22.04:LTS | dotnet8 | 8.0.132-8.0.32-0ubuntu1~22.04.1 | USN-8942-1 |
| Ubuntu:24.04:LTS | dotnet8 | 8.0.132-8.0.32-0ubuntu1~24.04.1 | USN-8942-1 |
| Ubuntu:24.04:LTS | dotnet8 | 8.0.132-8.0.32-0ubuntu1~24.04.1 | UBUNTU-CVE-2026-70179 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 – before 17.14.42 |
| Microsoft | Microsoft Visual Studio 2026 version 18.10 | 18.10.0 – before 18.10.4 |
| Microsoft | Microsoft.AspNetCore.Authentication.Negotiate | 10.0.0 – before 10.0.13 |
Weakness: CWE-290 · 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
References
- ASP.NET Core Elevation of Privilege Vulnerability vendor-advisory, patch