CVE-2026-26171
Description
Important: .NET 8.0 security update
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: alma — https://errata.almalinux.org/9/ALSA-2026-8469.html
Vendor advisory: alma — https://errata.almalinux.org/8/ALSA-2026-8475.html
Vendor advisory: alma — https://access.redhat.com/errata/RHSA-2026:8475
Vendor advisory: alma — https://errata.almalinux.org/8/ALSA-2026-8468.html
Vendor advisory: alma — https://access.redhat.com/errata/RHSA-2026:8468
Vendor advisory: alma — https://errata.almalinux.org/8/ALSA-2026-8473.html
Vendor advisory: alma — https://bugzilla.redhat.com/2457781
Vendor advisory: alma — https://bugzilla.redhat.com/2457741
Vendor advisory: alma — https://bugzilla.redhat.com/2457740
Vendor advisory: alma — https://bugzilla.redhat.com/2457739
Vendor advisory: alma — https://access.redhat.com/errata/RHSA-2026:8473
Vendor advisory: secure@microsoft.com — https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26171
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2026:8474
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2026:8471
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2026:8469
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rhel | 9 | fixed | |
| linux-kernel | - | not-affected | |
| macos | - | not-affected | |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| NuGet | System.Security.Cryptography.Xml | >=10.0.0,<10.0.6 | 10.0.6 |
| NuGet | System.Security.Cryptography.Xml | >=9.0.0,<9.0.15 | 9.0.15 |
| NuGet | System.Security.Cryptography.Xml | >=8.0.0,<8.0.3 | 8.0.3 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| microsoft | .net | {"startIncluding":"10.0.0","endExcluding":"10.0.6"} | 10.0.6 |
| microsoft | powershell | {"startIncluding":"7.5","endExcluding":"7.5.6"} | 7.5.6 |
References
- https://access.redhat.com/errata/RHSA-2026:8469
- https://access.redhat.com/errata/RHSA-2026:8471
- https://access.redhat.com/errata/RHSA-2026:8474
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26171
- https://github.com/dotnet/runtime/security/advisories/GHSA-w3x6-4m5h-cxqf
- https://nvd.nist.gov/vuln/detail/CVE-2026-26171
- https://github.com/dotnet/announcements/issues/389
- https://github.com/dotnet/runtime
- https://access.redhat.com/errata/RHSA-2026:8473
- https://bugzilla.redhat.com/2457739
- https://bugzilla.redhat.com/2457740
- https://bugzilla.redhat.com/2457741
- https://bugzilla.redhat.com/2457781
- https://errata.almalinux.org/8/ALSA-2026-8473.html
- https://access.redhat.com/errata/RHSA-2026:8468
- https://errata.almalinux.org/8/ALSA-2026-8468.html
- https://access.redhat.com/errata/RHSA-2026:8475
- https://errata.almalinux.org/8/ALSA-2026-8475.html
- https://errata.almalinux.org/9/ALSA-2026-8469.html
CWEs
CWE-400 CWE-611
Verify integrity in audit chain (admin only). AS-IS.