Vulnerability · Published Apr 14, 2026 · Assigned by microsoft
CVE-2026-26171.NET Denial of Service Vulnerability
High 7.5
In plain English
A high-severity uncontrolled resource consumption 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 1.8% (higher than 78% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.8%top 22.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Uncontrolled resource consumption in .NET allows an unauthorized attacker to deny service over a network.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | aspnetcore-runtime-10.0 | 10.0.6-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | aspnetcore-runtime-8.0 | 8.0.26-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | aspnetcore-runtime-8.0 | 8.0.26-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | aspnetcore-runtime-8.0 | 8.0.26-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | aspnetcore-runtime-9.0 | 9.0.15-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | aspnetcore-runtime-9.0 | 9.0.15-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | aspnetcore-runtime-dbg-10.0 | 10.0.6-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | aspnetcore-runtime-dbg-8.0 | 8.0.26-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | aspnetcore-runtime-dbg-8.0 | 8.0.26-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | aspnetcore-runtime-dbg-8.0 | 8.0.26-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | aspnetcore-runtime-dbg-9.0 | 9.0.15-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | aspnetcore-runtime-dbg-9.0 | 9.0.15-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | aspnetcore-targeting-pack-10.0 | 10.0.6-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | aspnetcore-targeting-pack-8.0 | 8.0.26-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | aspnetcore-targeting-pack-8.0 | 8.0.26-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | aspnetcore-targeting-pack-8.0 | 8.0.26-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | aspnetcore-targeting-pack-9.0 | 9.0.15-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | aspnetcore-targeting-pack-9.0 | 9.0.15-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | dotnet | 10.0.106-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:8 | dotnet-apphost-pack-10.0 | 10.0.6-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | dotnet-apphost-pack-8.0 | 8.0.26-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | dotnet-apphost-pack-8.0 | 8.0.26-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | dotnet-apphost-pack-8.0 | 8.0.26-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | dotnet-apphost-pack-9.0 | 9.0.15-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-apphost-pack-9.0 | 9.0.15-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | dotnet-host | 10.0.6-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:8 | dotnet-hostfxr-10.0 | 10.0.6-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | dotnet-hostfxr-8.0 | 8.0.26-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | dotnet-hostfxr-8.0 | 8.0.26-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | dotnet-hostfxr-8.0 | 8.0.26-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | dotnet-hostfxr-9.0 | 9.0.15-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-hostfxr-9.0 | 9.0.15-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | dotnet-runtime-10.0 | 10.0.6-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | dotnet-runtime-8.0 | 8.0.26-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | dotnet-runtime-8.0 | 8.0.26-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | dotnet-runtime-8.0 | 8.0.26-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | dotnet-runtime-9.0 | 9.0.15-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-runtime-9.0 | 9.0.15-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | dotnet-runtime-dbg-10.0 | 10.0.6-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | dotnet-runtime-dbg-8.0 | 8.0.26-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | dotnet-runtime-dbg-8.0 | 8.0.26-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | dotnet-runtime-dbg-8.0 | 8.0.26-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | dotnet-runtime-dbg-9.0 | 9.0.15-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-runtime-dbg-9.0 | 9.0.15-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | dotnet-sdk-10.0 | 10.0.106-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:8 | dotnet-sdk-10.0-source-built-artifacts | 10.0.106-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | dotnet-sdk-8.0 | 8.0.126-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | dotnet-sdk-8.0 | 8.0.126-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | dotnet-sdk-8.0 | 8.0.126-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | dotnet-sdk-8.0-source-built-artifacts | 8.0.126-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | dotnet-sdk-8.0-source-built-artifacts | 8.0.126-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | dotnet-sdk-8.0-source-built-artifacts | 8.0.126-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | dotnet-sdk-9.0 | 9.0.116-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-sdk-9.0 | 9.0.116-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:10 | dotnet-sdk-9.0-source-built-artifacts | 9.0.116-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-sdk-9.0-source-built-artifacts | 9.0.116-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | dotnet-sdk-aot-10.0 | 10.0.106-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | dotnet-sdk-aot-9.0 | 9.0.116-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-sdk-aot-9.0 | 9.0.116-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | dotnet-sdk-dbg-10.0 | 10.0.106-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | dotnet-sdk-dbg-8.0 | 8.0.126-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | dotnet-sdk-dbg-8.0 | 8.0.126-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | dotnet-sdk-dbg-8.0 | 8.0.126-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | dotnet-sdk-dbg-9.0 | 9.0.116-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-sdk-dbg-9.0 | 9.0.116-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | dotnet-targeting-pack-10.0 | 10.0.6-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | dotnet-targeting-pack-8.0 | 8.0.26-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | dotnet-targeting-pack-8.0 | 8.0.26-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | dotnet-targeting-pack-8.0 | 8.0.26-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | dotnet-targeting-pack-9.0 | 9.0.15-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-targeting-pack-9.0 | 9.0.15-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | dotnet-templates-10.0 | 10.0.106-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | dotnet-templates-8.0 | 8.0.126-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | dotnet-templates-8.0 | 8.0.126-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | dotnet-templates-8.0 | 8.0.126-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | dotnet-templates-9.0 | 9.0.116-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-templates-9.0 | 9.0.116-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:10 | netstandard-targeting-pack-2.1 | 9.0.116-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | netstandard-targeting-pack-2.1 | 9.0.116-1.el8_10 | ALSA-2026:8475 |
| Alpine:v3.23 | dotnet10-runtime | 10.0.6-r0 | ALPINE-CVE-2026-26171 |
| Alpine:v3.24 | dotnet10-runtime | 10.0.6-r0 | ALPINE-CVE-2026-26171 |
| Alpine:v3.20 | dotnet8-runtime | 8.0.26-r0 | ALPINE-CVE-2026-26171 |
| Alpine:v3.21 | dotnet8-runtime | 8.0.26-r0 | ALPINE-CVE-2026-26171 |
| Alpine:v3.22 | dotnet8-runtime | 8.0.26-r0 | ALPINE-CVE-2026-26171 |
| Alpine:v3.23 | dotnet8-runtime | 8.0.26-r0 | ALPINE-CVE-2026-26171 |
| Alpine:v3.24 | dotnet8-runtime | 8.0.26-r0 | ALPINE-CVE-2026-26171 |
| Alpine:v3.21 | dotnet9-runtime | 9.0.15-r0 | ALPINE-CVE-2026-26171 |
| Alpine:v3.22 | dotnet9-runtime | 9.0.15-r0 | ALPINE-CVE-2026-26171 |
| Alpine:v3.23 | dotnet9-runtime | 9.0.15-r0 | ALPINE-CVE-2026-26171 |
| Alpine:v3.24 | dotnet9-runtime | 9.0.15-r0 | ALPINE-CVE-2026-26171 |
| NuGet | system.security.cryptography.xml | 9.0.15 | GHSA-w3x6-4m5h-cxqf |
| NuGet | system.security.cryptography.xml | 8.0.3 | GHSA-w3x6-4m5h-cxqf |
| NuGet | system.security.cryptography.xml | 10.0.6 | GHSA-w3x6-4m5h-cxqf |
| Rocky Linux:10 | dotnet10.0 | 0:10.0.106-1.el10_1 | RLSA-2026:8467 |
| Rocky Linux:8 | dotnet10.0 | 0:10.0.106-1.el8_10 | RLSA-2026:8473 |
| Rocky Linux:9 | dotnet10.0 | 0:10.0.106-1.el9_7 | RLSA-2026:8471 |
| Rocky Linux:10 | dotnet8.0 | 0:8.0.126-1.el10_1 | RLSA-2026:8470 |
| Rocky Linux:8 | dotnet8.0 | 0:8.0.126-1.el8_10 | RLSA-2026:8468 |
| Rocky Linux:9 | dotnet8.0 | 0:8.0.126-1.el9_7 | RLSA-2026:8469 |
| Rocky Linux:10 | dotnet9.0 | 0:9.0.116-1.el10_1 | RLSA-2026:8472 |
| Rocky Linux:8 | dotnet9.0 | 0:9.0.116-1.el8_10 | RLSA-2026:8475 |
| Rocky Linux:9 | dotnet9.0 | 0:9.0.116-1.el9_7 | RLSA-2026:8474 |
| Ubuntu:24.04:LTS | dotnet10 | 10.0.106-10.0.6-0ubuntu1~24.04.1 | UBUNTU-CVE-2026-26171 |
| Ubuntu:25.10 | dotnet10 | 10.0.106-10.0.6-0ubuntu1~25.10.1 | UBUNTU-CVE-2026-26171 |
| Ubuntu:26.04:LTS | dotnet10 | 10.0.107-10.0.7-0ubuntu1~26.04.1 | UBUNTU-CVE-2026-26171 |
| Ubuntu:26.10 | dotnet10 | 10.0.107-10.0.7-0ubuntu1~26.04.1 | UBUNTU-CVE-2026-26171 |
| Ubuntu:22.04:LTS | dotnet6 | no fix listed | UBUNTU-CVE-2026-26171 |
| Ubuntu:22.04:LTS | dotnet7 | no fix listed | UBUNTU-CVE-2026-26171 |
| Ubuntu:22.04:LTS | dotnet8 | 8.0.126-8.0.26-0ubuntu1~22.04.1 | UBUNTU-CVE-2026-26171 |
| Ubuntu:24.04:LTS | dotnet8 | 8.0.126-8.0.26-0ubuntu1~24.04.1 | UBUNTU-CVE-2026-26171 |
| Ubuntu:25.10 | dotnet8 | 8.0.126-8.0.26-0ubuntu1~25.10.1 | UBUNTU-CVE-2026-26171 |
| Ubuntu:25.10 | dotnet9 | 9.0.116-9.0.15-0ubuntu1~25.10.1 | UBUNTU-CVE-2026-26171 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | .NET 10.0 | 10.0.0 – before 10.0.6 |
| Microsoft | .NET 8.0 | 8.0.0 – before 8.0.26 |
| Microsoft | .NET 9.0 | 9.0.0 – before 9.0.15 |
| Microsoft | PowerShell 7.5 | 7.5.0 – before 7.5.6 |
| Microsoft | PowerShell 7.6 | 7.6.0 – before 7.6.1 |
Weakness: CWE-400, CWE-611, CWE-776 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
References
- .NET Denial of Service Vulnerability vendor-advisory, patch
- https://access.redhat.com/security/cve/CVE-2026-26171 vdb-entry, x_refsource_REDHAT
- RHBZ#2457739 issue-tracking, x_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26171.json x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:13281 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:13280 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8467 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8470 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8472 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8473 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8468 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8475 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:13693 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:13283 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:13282 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8471 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8469 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8474 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:9077 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:9080 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:9205 vendor-advisory, x_refsource_REDHAT