Vulnerability · Published Jun 9, 2026 · Assigned by microsoft
CVE-2026-45491.NET Tampering Vulnerability
Medium 6.2
In plain English
A medium-severity security flaw 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 33% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.2Medium
Exploit odds (30 days)0.4%top 66.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | aspnetcore-runtime-10.0 | 10.0.9-1.el10_2 | ALSA-2026:25115 |
| AlmaLinux:8 | aspnetcore-runtime-10.0 | 10.0.9-1.el8_10 | ALSA-2026:25114 |
| AlmaLinux:9 | aspnetcore-runtime-10.0 | 10.0.9-1.el9_8 | ALSA-2026:25222 |
| AlmaLinux:10 | aspnetcore-runtime-8.0 | 8.0.28-1.el10_2 | ALSA-2026:25111 |
| AlmaLinux:8 | aspnetcore-runtime-8.0 | 8.0.28-1.el8_10 | ALSA-2026:25110 |
| AlmaLinux:9 | aspnetcore-runtime-8.0 | 8.0.28-1.el9_8 | ALSA-2026:25220 |
| AlmaLinux:10 | aspnetcore-runtime-9.0 | 9.0.17-1.el10_2 | ALSA-2026:25112 |
| AlmaLinux:8 | aspnetcore-runtime-9.0 | 9.0.17-1.el8_10 | ALSA-2026:25113 |
| AlmaLinux:9 | aspnetcore-runtime-9.0 | 9.0.17-1.el9_8 | ALSA-2026:25221 |
| AlmaLinux:10 | aspnetcore-runtime-dbg-10.0 | 10.0.9-1.el10_2 | ALSA-2026:25115 |
| AlmaLinux:8 | aspnetcore-runtime-dbg-10.0 | 10.0.9-1.el8_10 | ALSA-2026:25114 |
| AlmaLinux:9 | aspnetcore-runtime-dbg-10.0 | 10.0.9-1.el9_8 | ALSA-2026:25222 |
| AlmaLinux:10 | aspnetcore-runtime-dbg-8.0 | 8.0.28-1.el10_2 | ALSA-2026:25111 |
| AlmaLinux:8 | aspnetcore-runtime-dbg-8.0 | 8.0.28-1.el8_10 | ALSA-2026:25110 |
| AlmaLinux:9 | aspnetcore-runtime-dbg-8.0 | 8.0.28-1.el9_8 | ALSA-2026:25220 |
| AlmaLinux:10 | aspnetcore-runtime-dbg-9.0 | 9.0.17-1.el10_2 | ALSA-2026:25112 |
| AlmaLinux:8 | aspnetcore-runtime-dbg-9.0 | 9.0.17-1.el8_10 | ALSA-2026:25113 |
| AlmaLinux:9 | aspnetcore-runtime-dbg-9.0 | 9.0.17-1.el9_8 | ALSA-2026:25221 |
| AlmaLinux:10 | aspnetcore-targeting-pack-10.0 | 10.0.9-1.el10_2 | ALSA-2026:25115 |
| AlmaLinux:8 | aspnetcore-targeting-pack-10.0 | 10.0.9-1.el8_10 | ALSA-2026:25114 |
| AlmaLinux:9 | aspnetcore-targeting-pack-10.0 | 10.0.9-1.el9_8 | ALSA-2026:25222 |
| AlmaLinux:10 | aspnetcore-targeting-pack-8.0 | 8.0.28-1.el10_2 | ALSA-2026:25111 |
| AlmaLinux:8 | aspnetcore-targeting-pack-8.0 | 8.0.28-1.el8_10 | ALSA-2026:25110 |
| AlmaLinux:9 | aspnetcore-targeting-pack-8.0 | 8.0.28-1.el9_8 | ALSA-2026:25220 |
| AlmaLinux:10 | aspnetcore-targeting-pack-9.0 | 9.0.17-1.el10_2 | ALSA-2026:25112 |
| AlmaLinux:8 | aspnetcore-targeting-pack-9.0 | 9.0.17-1.el8_10 | ALSA-2026:25113 |
| AlmaLinux:9 | aspnetcore-targeting-pack-9.0 | 9.0.17-1.el9_8 | ALSA-2026:25221 |
| AlmaLinux:8 | dotnet | 10.0.109-1.el8_10 | ALSA-2026:25114 |
| AlmaLinux:10 | dotnet-apphost-pack-10.0 | 10.0.9-1.el10_2 | ALSA-2026:25115 |
| AlmaLinux:8 | dotnet-apphost-pack-10.0 | 10.0.9-1.el8_10 | ALSA-2026:25114 |
| AlmaLinux:9 | dotnet-apphost-pack-10.0 | 10.0.9-1.el9_8 | ALSA-2026:25222 |
| AlmaLinux:10 | dotnet-apphost-pack-8.0 | 8.0.28-1.el10_2 | ALSA-2026:25111 |
| AlmaLinux:8 | dotnet-apphost-pack-8.0 | 8.0.28-1.el8_10 | ALSA-2026:25110 |
| AlmaLinux:9 | dotnet-apphost-pack-8.0 | 8.0.28-1.el9_8 | ALSA-2026:25220 |
| AlmaLinux:10 | dotnet-apphost-pack-9.0 | 9.0.17-1.el10_2 | ALSA-2026:25112 |
| AlmaLinux:8 | dotnet-apphost-pack-9.0 | 9.0.17-1.el8_10 | ALSA-2026:25113 |
| AlmaLinux:9 | dotnet-apphost-pack-9.0 | 9.0.17-1.el9_8 | ALSA-2026:25221 |
| AlmaLinux:10 | dotnet-host | 10.0.9-1.el10_2 | ALSA-2026:25115 |
| AlmaLinux:8 | dotnet-host | 10.0.9-1.el8_10 | ALSA-2026:25114 |
| AlmaLinux:9 | dotnet-host | 10.0.9-1.el9_8 | ALSA-2026:25222 |
| AlmaLinux:10 | dotnet-hostfxr-10.0 | 10.0.9-1.el10_2 | ALSA-2026:25115 |
| AlmaLinux:8 | dotnet-hostfxr-10.0 | 10.0.9-1.el8_10 | ALSA-2026:25114 |
| AlmaLinux:9 | dotnet-hostfxr-10.0 | 10.0.9-1.el9_8 | ALSA-2026:25222 |
| AlmaLinux:10 | dotnet-hostfxr-8.0 | 8.0.28-1.el10_2 | ALSA-2026:25111 |
| AlmaLinux:8 | dotnet-hostfxr-8.0 | 8.0.28-1.el8_10 | ALSA-2026:25110 |
| AlmaLinux:9 | dotnet-hostfxr-8.0 | 8.0.28-1.el9_8 | ALSA-2026:25220 |
| AlmaLinux:10 | dotnet-hostfxr-9.0 | 9.0.17-1.el10_2 | ALSA-2026:25112 |
| AlmaLinux:8 | dotnet-hostfxr-9.0 | 9.0.17-1.el8_10 | ALSA-2026:25113 |
| AlmaLinux:9 | dotnet-hostfxr-9.0 | 9.0.17-1.el9_8 | ALSA-2026:25221 |
| AlmaLinux:10 | dotnet-runtime-10.0 | 10.0.9-1.el10_2 | ALSA-2026:25115 |
| AlmaLinux:8 | dotnet-runtime-10.0 | 10.0.9-1.el8_10 | ALSA-2026:25114 |
| AlmaLinux:9 | dotnet-runtime-10.0 | 10.0.9-1.el9_8 | ALSA-2026:25222 |
| AlmaLinux:10 | dotnet-runtime-8.0 | 8.0.28-1.el10_2 | ALSA-2026:25111 |
| AlmaLinux:8 | dotnet-runtime-8.0 | 8.0.28-1.el8_10 | ALSA-2026:25110 |
| AlmaLinux:9 | dotnet-runtime-8.0 | 8.0.28-1.el9_8 | ALSA-2026:25220 |
| AlmaLinux:10 | dotnet-runtime-9.0 | 9.0.17-1.el10_2 | ALSA-2026:25112 |
| AlmaLinux:8 | dotnet-runtime-9.0 | 9.0.17-1.el8_10 | ALSA-2026:25113 |
| AlmaLinux:9 | dotnet-runtime-9.0 | 9.0.17-1.el9_8 | ALSA-2026:25221 |
| AlmaLinux:10 | dotnet-runtime-dbg-10.0 | 10.0.9-1.el10_2 | ALSA-2026:25115 |
| AlmaLinux:8 | dotnet-runtime-dbg-10.0 | 10.0.9-1.el8_10 | ALSA-2026:25114 |
| AlmaLinux:9 | dotnet-runtime-dbg-10.0 | 10.0.9-1.el9_8 | ALSA-2026:25222 |
| AlmaLinux:10 | dotnet-runtime-dbg-8.0 | 8.0.28-1.el10_2 | ALSA-2026:25111 |
| AlmaLinux:8 | dotnet-runtime-dbg-8.0 | 8.0.28-1.el8_10 | ALSA-2026:25110 |
| AlmaLinux:9 | dotnet-runtime-dbg-8.0 | 8.0.28-1.el9_8 | ALSA-2026:25220 |
| AlmaLinux:10 | dotnet-runtime-dbg-9.0 | 9.0.17-1.el10_2 | ALSA-2026:25112 |
| AlmaLinux:8 | dotnet-runtime-dbg-9.0 | 9.0.17-1.el8_10 | ALSA-2026:25113 |
| AlmaLinux:9 | dotnet-runtime-dbg-9.0 | 9.0.17-1.el9_8 | ALSA-2026:25221 |
| AlmaLinux:10 | dotnet-sdk-10.0 | 10.0.109-1.el10_2 | ALSA-2026:25115 |
| AlmaLinux:8 | dotnet-sdk-10.0 | 10.0.109-1.el8_10 | ALSA-2026:25114 |
| AlmaLinux:9 | dotnet-sdk-10.0 | 10.0.109-1.el9_8 | ALSA-2026:25222 |
| AlmaLinux:10 | dotnet-sdk-10.0-source-built-artifacts | 10.0.109-1.el10_2 | ALSA-2026:25115 |
| AlmaLinux:8 | dotnet-sdk-10.0-source-built-artifacts | 10.0.109-1.el8_10 | ALSA-2026:25114 |
| AlmaLinux:9 | dotnet-sdk-10.0-source-built-artifacts | 10.0.109-1.el9_8 | ALSA-2026:25222 |
| AlmaLinux:10 | dotnet-sdk-8.0 | 8.0.128-1.el10_2 | ALSA-2026:25111 |
| AlmaLinux:8 | dotnet-sdk-8.0 | 8.0.128-1.el8_10 | ALSA-2026:25110 |
| AlmaLinux:9 | dotnet-sdk-8.0 | 8.0.128-1.el9_8 | ALSA-2026:25220 |
| AlmaLinux:10 | dotnet-sdk-8.0-source-built-artifacts | 8.0.128-1.el10_2 | ALSA-2026:25111 |
| AlmaLinux:8 | dotnet-sdk-8.0-source-built-artifacts | 8.0.128-1.el8_10 | ALSA-2026:25110 |
| AlmaLinux:9 | dotnet-sdk-8.0-source-built-artifacts | 8.0.128-1.el9_8 | ALSA-2026:25220 |
| AlmaLinux:10 | dotnet-sdk-9.0 | 9.0.118-1.el10_2 | ALSA-2026:25112 |
| AlmaLinux:8 | dotnet-sdk-9.0 | 9.0.118-1.el8_10 | ALSA-2026:25113 |
| AlmaLinux:9 | dotnet-sdk-9.0 | 9.0.118-1.el9_8 | ALSA-2026:25221 |
| AlmaLinux:10 | dotnet-sdk-9.0-source-built-artifacts | 9.0.118-1.el10_2 | ALSA-2026:25112 |
| AlmaLinux:8 | dotnet-sdk-9.0-source-built-artifacts | 9.0.118-1.el8_10 | ALSA-2026:25113 |
| AlmaLinux:9 | dotnet-sdk-9.0-source-built-artifacts | 9.0.118-1.el9_8 | ALSA-2026:25221 |
| AlmaLinux:10 | dotnet-sdk-aot-10.0 | 10.0.109-1.el10_2 | ALSA-2026:25115 |
| AlmaLinux:8 | dotnet-sdk-aot-10.0 | 10.0.109-1.el8_10 | ALSA-2026:25114 |
| AlmaLinux:9 | dotnet-sdk-aot-10.0 | 10.0.109-1.el9_8 | ALSA-2026:25222 |
| AlmaLinux:10 | dotnet-sdk-aot-9.0 | 9.0.118-1.el10_2 | ALSA-2026:25112 |
| AlmaLinux:8 | dotnet-sdk-aot-9.0 | 9.0.118-1.el8_10 | ALSA-2026:25113 |
| AlmaLinux:9 | dotnet-sdk-aot-9.0 | 9.0.118-1.el9_8 | ALSA-2026:25221 |
| AlmaLinux:10 | dotnet-sdk-dbg-10.0 | 10.0.109-1.el10_2 | ALSA-2026:25115 |
| AlmaLinux:8 | dotnet-sdk-dbg-10.0 | 10.0.109-1.el8_10 | ALSA-2026:25114 |
| AlmaLinux:9 | dotnet-sdk-dbg-10.0 | 10.0.109-1.el9_8 | ALSA-2026:25222 |
| AlmaLinux:10 | dotnet-sdk-dbg-8.0 | 8.0.128-1.el10_2 | ALSA-2026:25111 |
| AlmaLinux:8 | dotnet-sdk-dbg-8.0 | 8.0.128-1.el8_10 | ALSA-2026:25110 |
| AlmaLinux:9 | dotnet-sdk-dbg-8.0 | 8.0.128-1.el9_8 | ALSA-2026:25220 |
| AlmaLinux:10 | dotnet-sdk-dbg-9.0 | 9.0.118-1.el10_2 | ALSA-2026:25112 |
| AlmaLinux:8 | dotnet-sdk-dbg-9.0 | 9.0.118-1.el8_10 | ALSA-2026:25113 |
| AlmaLinux:9 | dotnet-sdk-dbg-9.0 | 9.0.118-1.el9_8 | ALSA-2026:25221 |
| AlmaLinux:10 | dotnet-targeting-pack-10.0 | 10.0.9-1.el10_2 | ALSA-2026:25115 |
| AlmaLinux:8 | dotnet-targeting-pack-10.0 | 10.0.9-1.el8_10 | ALSA-2026:25114 |
| AlmaLinux:9 | dotnet-targeting-pack-10.0 | 10.0.9-1.el9_8 | ALSA-2026:25222 |
| AlmaLinux:10 | dotnet-targeting-pack-8.0 | 8.0.28-1.el10_2 | ALSA-2026:25111 |
| AlmaLinux:8 | dotnet-targeting-pack-8.0 | 8.0.28-1.el8_10 | ALSA-2026:25110 |
| AlmaLinux:9 | dotnet-targeting-pack-8.0 | 8.0.28-1.el9_8 | ALSA-2026:25220 |
| AlmaLinux:10 | dotnet-targeting-pack-9.0 | 9.0.17-1.el10_2 | ALSA-2026:25112 |
| AlmaLinux:8 | dotnet-targeting-pack-9.0 | 9.0.17-1.el8_10 | ALSA-2026:25113 |
| AlmaLinux:9 | dotnet-targeting-pack-9.0 | 9.0.17-1.el9_8 | ALSA-2026:25221 |
| AlmaLinux:10 | dotnet-templates-10.0 | 10.0.109-1.el10_2 | ALSA-2026:25115 |
| AlmaLinux:8 | dotnet-templates-10.0 | 10.0.109-1.el8_10 | ALSA-2026:25114 |
| AlmaLinux:9 | dotnet-templates-10.0 | 10.0.109-1.el9_8 | ALSA-2026:25222 |
| AlmaLinux:10 | dotnet-templates-8.0 | 8.0.128-1.el10_2 | ALSA-2026:25111 |
| AlmaLinux:8 | dotnet-templates-8.0 | 8.0.128-1.el8_10 | ALSA-2026:25110 |
| AlmaLinux:9 | dotnet-templates-8.0 | 8.0.128-1.el9_8 | ALSA-2026:25220 |
| AlmaLinux:10 | dotnet-templates-9.0 | 9.0.118-1.el10_2 | ALSA-2026:25112 |
| AlmaLinux:8 | dotnet-templates-9.0 | 9.0.118-1.el8_10 | ALSA-2026:25113 |
| AlmaLinux:9 | dotnet-templates-9.0 | 9.0.118-1.el9_8 | ALSA-2026:25221 |
| AlmaLinux:10 | netstandard-targeting-pack-2.1 | 9.0.118-1.el10_2 | ALSA-2026:25112 |
| AlmaLinux:8 | netstandard-targeting-pack-2.1 | 9.0.118-1.el8_10 | ALSA-2026:25113 |
| AlmaLinux:9 | netstandard-targeting-pack-2.1 | 9.0.118-1.el9_8 | ALSA-2026:25221 |
| Alpine:v3.23 | dotnet10-runtime | 10.0.9-r0 | ALPINE-CVE-2026-45491 |
| Alpine:v3.24 | dotnet10-runtime | 10.0.9-r0 | ALPINE-CVE-2026-45491 |
| Alpine:v3.22 | dotnet8-runtime | 8.0.28-r0 | ALPINE-CVE-2026-45491 |
| Alpine:v3.23 | dotnet8-runtime | 8.0.28-r0 | ALPINE-CVE-2026-45491 |
| Alpine:v3.24 | dotnet8-runtime | 8.0.28-r0 | ALPINE-CVE-2026-45491 |
| Alpine:v3.21 | dotnet9-runtime | 9.0.17-r0 | ALPINE-CVE-2026-45491 |
| Alpine:v3.22 | dotnet9-runtime | 9.0.17-r0 | ALPINE-CVE-2026-45491 |
| Alpine:v3.23 | dotnet9-runtime | 9.0.17-r0 | ALPINE-CVE-2026-45491 |
| Alpine:v3.24 | dotnet9-runtime | 9.0.17-r0 | ALPINE-CVE-2026-45491 |
| NuGet | microsoft.netcore.app.runtime.linux-x64 | 10.0.9 | GHSA-7q4v-2mr6-5gpx |
| NuGet | microsoft.netcore.app.runtime.linux-x64 | 8.0.28 | GHSA-7q4v-2mr6-5gpx |
| NuGet | microsoft.netcore.app.runtime.linux-x64 | 9.0.17 | GHSA-7q4v-2mr6-5gpx |
| NuGet | microsoft.netcore.app.runtime.osx-arm64 | 9.0.17 | GHSA-7q4v-2mr6-5gpx |
| NuGet | microsoft.netcore.app.runtime.osx-arm64 | 8.0.28 | GHSA-7q4v-2mr6-5gpx |
| NuGet | microsoft.netcore.app.runtime.osx-arm64 | 10.0.9 | GHSA-7q4v-2mr6-5gpx |
| NuGet | microsoft.netcore.app.runtime.win-x64 | 10.0.9 | GHSA-7q4v-2mr6-5gpx |
| NuGet | microsoft.netcore.app.runtime.win-x64 | 9.0.17 | GHSA-7q4v-2mr6-5gpx |
| NuGet | microsoft.netcore.app.runtime.win-x64 | 8.0.28 | GHSA-7q4v-2mr6-5gpx |
| Rocky Linux:10 | dotnet10.0 | 0:10.0.109-1.el10_2 | RLSA-2026:25115 |
| Rocky Linux:8 | dotnet10.0 | 0:10.0.109-1.el8_10 | RLSA-2026:25114 |
| Rocky Linux:9 | dotnet10.0 | 0:10.0.109-1.el9_8 | RLSA-2026:25222 |
| Rocky Linux:10 | dotnet8.0 | 0:8.0.128-1.el10_2 | RLSA-2026:25111 |
| Rocky Linux:8 | dotnet8.0 | 0:8.0.128-1.el8_10 | RLSA-2026:25110 |
| Rocky Linux:9 | dotnet8.0 | 0:8.0.128-1.el9_8 | RLSA-2026:25220 |
| Rocky Linux:10 | dotnet9.0 | 0:9.0.118-1.el10_2 | RLSA-2026:25112 |
| Rocky Linux:8 | dotnet9.0 | 0:9.0.118-1.el8_10 | RLSA-2026:25113 |
| Rocky Linux:9 | dotnet9.0 | 0:9.0.118-1.el9_8 | RLSA-2026:25221 |
| Ubuntu:24.04:LTS | dotnet10 | 10.0.109-10.0.9-0ubuntu1~24.04.1 | UBUNTU-CVE-2026-45491 |
| Ubuntu:25.10 | dotnet10 | 10.0.109-10.0.9-0ubuntu1~25.10.1 | UBUNTU-CVE-2026-45491 |
| Ubuntu:26.04:LTS | dotnet10 | 10.0.109-10.0.9-0ubuntu1~26.04.1 | UBUNTU-CVE-2026-45491 |
| Ubuntu:26.10 | dotnet10 | 10.0.109-10.0.9-0ubuntu1 | UBUNTU-CVE-2026-45491 |
| Ubuntu:22.04:LTS | dotnet6 | no fix listed | UBUNTU-CVE-2026-45491 |
| Ubuntu:22.04:LTS | dotnet7 | no fix listed | UBUNTU-CVE-2026-45491 |
| Ubuntu:22.04:LTS | dotnet8 | 8.0.128-8.0.28-0ubuntu1~22.04.1 | UBUNTU-CVE-2026-45491 |
| Ubuntu:24.04:LTS | dotnet8 | 8.0.128-8.0.28-0ubuntu1~24.04.1 | UBUNTU-CVE-2026-45491 |
| Ubuntu:25.10 | dotnet8 | 8.0.128-8.0.28-0ubuntu1~25.10.1 | UBUNTU-CVE-2026-45491 |
| Ubuntu:25.10 | dotnet9 | 9.0.118-9.0.17-0ubuntu1~25.10.1 | UBUNTU-CVE-2026-45491 |
Affected products (as reported)
Weakness: CWE-59 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C
References
- .NET Tampering Vulnerability vendor-advisory, patch