Vulnerability · Published Mar 10, 2026 · Assigned by microsoft
CVE-2026-26131.NET Elevation of Privilege Vulnerability
High 7.8
In plain English
A high-severity incorrect default permissions in .NET 10.0 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.4%top 65.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Incorrect default permissions in .NET allows an authorized attacker to elevate privileges locally.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | dotnet10-runtime | 10.0.4-r0 | ALPINE-CVE-2026-26131 |
| Alpine:v3.24 | dotnet10-runtime | 10.0.4-r0 | ALPINE-CVE-2026-26131 |
| NuGet | microsoft.netcore.app.runtime.linux-arm | 10.0.4 | GHSA-crjq-wm6x-6qx7 |
| NuGet | microsoft.netcore.app.runtime.linux-arm64 | 10.0.4 | GHSA-crjq-wm6x-6qx7 |
| NuGet | microsoft.netcore.app.runtime.linux-musl-arm | 10.0.4 | GHSA-crjq-wm6x-6qx7 |
| NuGet | microsoft.netcore.app.runtime.linux-musl-arm64 | 10.0.4 | GHSA-crjq-wm6x-6qx7 |
| NuGet | microsoft.netcore.app.runtime.linux-musl-x64 | 10.0.4 | GHSA-crjq-wm6x-6qx7 |
| NuGet | microsoft.netcore.app.runtime.linux-x64 | 10.0.4 | GHSA-crjq-wm6x-6qx7 |
| Ubuntu:22.04:LTS | dotnet7 | no fix listed | UBUNTU-CVE-2026-26131 |
Affected products (as reported)
Weakness: CWE-276 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- .NET Elevation of Privilege Vulnerability vendor-advisory, patch