PatchTheCVECVE-2026-70179: Authentication bypass by spoofing in ASP.NET Core allows an authorized attacker to elevate privileges over a n
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HIGH 7.5WATCHLIST
CVE-2026-70179 is a high-severity flaw (CVSS 7.5) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Authentication bypass by spoofing in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
Why this priority
- High severity
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.6% (top 54%) |
| CISA exploited list | No |
| Weakness | CWE-290 |
| Published | 2026-10-13 |
| Last modified | 2026-10-22 |
Publisher (CNA): Microsoft Corporation
Timeline
- Published CVE record published
- Updated Record last modified
Exact fixes by distribution
NuGet (.NET) · Microsoft.AspNetCore.Authentication.Negotiate · FIXED · 10.0.13 · vulnerable: >= 10.0.0, <= 10.0.12 · source
dotnet add package Microsoft.AspNetCore.Authentication.Negotiate --version 10.0.13
Fedora 46 · kwin-zones · FIXED · 1.0.13-1.fc46 · FEDORA-2026-95888f332b · source
sudo dnf upgrade --advisory=FEDORA-2026-95888f332b
Fedora ELN · nginx-mod-brotli · FIXED · 1.0.0~rc-16.eln159 · FEDORA-2026-501a6a8273 · source
sudo dnf upgrade --advisory=FEDORA-2026-501a6a8273
Ubuntu 22.04 · dotnet6 · DEFERRED
Ubuntu 22.04 · dotnet8 · FIXED · 8.0.132-8.0.32-0ubuntu1~22.04.1
sudo apt update && sudo apt install --only-upgrade dotnet8
dpkg --compare-versions "$(dpkg-query -W -f='${Version}' dotnet8)" ge "8.0.132-8.0.32-0ubuntu1~22.04.1" && echo PATCHED || echo STILL-VULNERABLE
Ubuntu 24.04 · dotnet8 · FIXED · 8.0.132-8.0.32-0ubuntu1~24.04.1
sudo apt update && sudo apt install --only-upgrade dotnet8
dpkg --compare-versions "$(dpkg-query -W -f='${Version}' dotnet8)" ge "8.0.132-8.0.32-0ubuntu1~24.04.1" && echo PATCHED || echo STILL-VULNERABLE
Ubuntu 24.04 · dotnet10 · FIXED · 10.0.113-10.0.13-0ubuntu1~24.04.1
sudo apt update && sudo apt install --only-upgrade dotnet10
dpkg --compare-versions "$(dpkg-query -W -f='${Version}' dotnet10)" ge "10.0.113-10.0.13-0ubuntu1~24.04.1" && echo PATCHED || echo STILL-VULNERABLE
RHEL 10 · dotnet8.0 · FIXED · dotnet8.0-8.0.132-1.el10_2
sudo dnf upgrade --advisory=RHSA-2026:86168
rpm -q dotnet8.0
RHEL 10 · dotnet9.0 · FIXED · dotnet9.0-9.0.122-1.el10_2
sudo dnf upgrade --advisory=RHSA-2026:86172
rpm -q dotnet9.0
RHEL 10 · dotnet10.0 · FIXED · dotnet10.0-10.0.113-1.el10_2
sudo dnf upgrade --advisory=RHSA-2026:86195
rpm -q dotnet10.0
RHEL 10.0 Extended Update Support · dotnet9.0 · FIXED · dotnet9.0-9.0.122-1.el10_0
sudo dnf upgrade --advisory=RHSA-2026:88424
rpm -q dotnet9.0
RHEL 10.0 Extended Update Support · dotnet8.0 · FIXED · dotnet8.0-8.0.132-1.el10_0
sudo dnf upgrade --advisory=RHSA-2026:88474
rpm -q dotnet8.0
Alpine 3.22 · dotnet8-runtime · FIXED · dotnet8-runtime-8.0.32-r0
apk add --upgrade dotnet8-runtime
apk info -v dotnet8-runtime
Alpine 3.22 · dotnet9-runtime · FIXED · dotnet9-runtime-9.0.21-r0
apk add --upgrade dotnet9-runtime
apk info -v dotnet9-runtime
Alpine 3.23 · dotnet10-runtime · FIXED · dotnet10-runtime-10.0.13-r0
apk add --upgrade dotnet10-runtime
apk info -v dotnet10-runtime
Alpine 3.23 · dotnet8-runtime · FIXED · dotnet8-runtime-8.0.32-r0
apk add --upgrade dotnet8-runtime
apk info -v dotnet8-runtime
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Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.