CVE-2026-57108
HighAccess of resource using incompatible type ('type confusion') in .NET Core allows an unauthorized attacker to deny service over a network.
Published Jul 14, 2026 · Updated Oct 8, 2026 · Also known as BIT-dotnet-2026-57108, BIT-dotnet-sdk-2026-57108, EUVD-2026-44278, GHSA-rp2p-6cmp-jxj9, UBUNTU-CVE-2026-57108, USN-8553-1
Key Facts
Patch in the next maintenance window- CVE-2026-57108 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting .net (Microsoft), dotnet10-runtime (alpine), dotnet8-runtime (alpine) and 22 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 1.2% probability of exploitation in the next 30 days.
- Fixed versions are available, including .NET 10.0 10.0.10, .NET 10.0 10.0.6, .NET 10.0 5104034.
- Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
CVSS v3.1
7.5
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
EPSS (30-day exploit likelihood)
1.2%
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2026-57108 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Access of resource using incompatible type ('type confusion') in .NET Core allows an unauthorized attacker to deny service over a network.
Affected Products
296 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| .netMicrosoft | 10.0.0, 8.0.0, 9.0.0 | 8.0.29 |
| dotnet10-runtimealpine | See advisory | 10.0.10-r0 |
| dotnet8-runtimealpine | See advisory | 8.0.29-r0 |
| dotnet9-runtimealpine | See advisory | 9.0.18-r0 |
| dotnet-bootstrap-8chainguard | See advisory | 8.0.130-r0 |
Patched Releases
.NET 10.0
10.0.10, 10.0.6, 5104034
.NET 8.0
8.0.29
.NET 9.0
9.0.18
aspnetcore-runtime-10.0
10.0.10-0ubuntu1~24.04.1, 10.0.10-0ubuntu1~26.04.1, 10.0.10-1.0.1.el10_2, 10.0.10-1.0.1.el8_10, 10.0.10-1.0.1.el9_8, 10.0.10-1.amzn2023.0.1
aspnetcore-runtime-8.0
8.0.29-0ubuntu1~22.04.1, 8.0.29-0ubuntu1~24.04.1, 8.0.29-1.0.1.el10_2, 8.0.29-1.0.1.el8_10, 8.0.29-1.0.1.el9_8, 8.0.29-1.amzn2023.0.1
aspnetcore-runtime-9.0
9.0.18-1.0.1.el10_2, 9.0.18-1.0.1.el8_10, 9.0.18-1.0.1.el9_8, 9.0.18-1.amzn2023.0.1
aspnetcore-runtime-dbg-10.0
10.0.10-0ubuntu1~24.04.1, 10.0.10-0ubuntu1~26.04.1, 10.0.10-1.0.1.el10_2, 10.0.10-1.0.1.el8_10, 10.0.10-1.0.1.el9_8, 10.0.10-1.amzn2023.0.1
aspnetcore-runtime-dbg-8.0
8.0.29-0ubuntu1~22.04.1, 8.0.29-0ubuntu1~24.04.1, 8.0.29-1.0.1.el10_2, 8.0.29-1.0.1.el8_10, 8.0.29-1.0.1.el9_8, 8.0.29-1.amzn2023.0.1
aspnetcore-runtime-dbg-9.0
9.0.18-1.0.1.el10_2, 9.0.18-1.0.1.el8_10, 9.0.18-1.0.1.el9_8, 9.0.18-1.amzn2023.0.1
aspnetcore-targeting-pack-10.0
10.0.10-0ubuntu1~24.04.1, 10.0.10-0ubuntu1~26.04.1, 10.0.10-1.0.1.el10_2, 10.0.10-1.0.1.el8_10, 10.0.10-1.0.1.el9_8, 10.0.10-1.amzn2023.0.1
aspnetcore-targeting-pack-8.0
8.0.29-0ubuntu1~22.04.1, 8.0.29-0ubuntu1~24.04.1, 8.0.29-1.0.1.el10_2, 8.0.29-1.0.1.el8_10, 8.0.29-1.0.1.el9_8, 8.0.29-1.amzn2023.0.1
aspnetcore-targeting-pack-9.0
9.0.18-1.0.1.el10_2, 9.0.18-1.0.1.el8_10, 9.0.18-1.0.1.el9_8, 9.0.18-1.amzn2023.0.1
dotnet
10.0.110-1.0.1.el8_10, 10.0.110-1.amzn2023.0.1, 10.0.6, 8.0.129-1.amzn2023.0.1, 8.0.29, 9.0.119-1.amzn2023.0.1, 9.0.18
dotnet-8
8.0.119-r0
dotnet-9
9.0.109-r0
dotnet-apphost-pack-10.0
10.0.10-0ubuntu1~24.04.1, 10.0.10-0ubuntu1~26.04.1, 10.0.10-1.0.1.el10_2, 10.0.10-1.0.1.el8_10, 10.0.10-1.0.1.el9_8, 10.0.10-1.amzn2023.0.1
dotnet-apphost-pack-8.0
8.0.29-0ubuntu1~22.04.1, 8.0.29-0ubuntu1~24.04.1, 8.0.29-1.0.1.el10_2, 8.0.29-1.0.1.el8_10, 8.0.29-1.0.1.el9_8, 8.0.29-1.amzn2023.0.1
dotnet-apphost-pack-9.0
9.0.18-1.0.1.el10_2, 9.0.18-1.0.1.el8_10, 9.0.18-1.0.1.el9_8, 9.0.18-1.amzn2023.0.1
dotnet-bootstrap-8
8.0.130-r0
dotnet-bootstrap-9
9.0.120-r0
dotnet-host
10.0.10-1.0.1.el10_2, 10.0.10-1.0.1.el8_10, 10.0.10-1.0.1.el9_8, 10.0.10-1.amzn2023.0.1, 8.0.29-1.amzn2023.0.1, 9.0.18-1.amzn2023.0.1
dotnet-host-10.0
10.0.10-0ubuntu1~24.04.1, 10.0.10-0ubuntu1~26.04.1
dotnet-host-8.0
8.0.29-0ubuntu1~22.04.1, 8.0.29-0ubuntu1~24.04.1
dotnet-hostfxr-10.0
10.0.10-0ubuntu1~24.04.1, 10.0.10-0ubuntu1~26.04.1, 10.0.10-1.0.1.el10_2, 10.0.10-1.0.1.el8_10, 10.0.10-1.0.1.el9_8, 10.0.10-1.amzn2023.0.1
dotnet-hostfxr-8.0
8.0.29-0ubuntu1~22.04.1, 8.0.29-0ubuntu1~24.04.1, 8.0.29-1.0.1.el10_2, 8.0.29-1.0.1.el8_10, 8.0.29-1.0.1.el9_8, 8.0.29-1.amzn2023.0.1
Timeline
Publicly disclosed
Jul 14, 2026
Last updated
Oct 8, 2026
Weakness Type
- CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
References
- advisoryRHSA-2026:26638
- advisoryRHSA-2026:27171
- advisoryRHSA-2026:41893
- advisoryRHSA-2026:41894
- advisoryRHSA-2026:41895
FAQ
Common Questions.
Access of resource using incompatible type ('type confusion') in .NET Core allows an unauthorized attacker to deny service over a network.
Affected: .net (Microsoft) versions 10.0.0, 8.0.0, 9.0.0; dotnet10-runtime (alpine); dotnet8-runtime (alpine), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including .NET 10.0 10.0.10, .NET 10.0 10.0.6, .NET 10.0 5104034.
Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
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