Bug 2548809 (CVE-2026-96238) - CVE-2026-96238 dotnet8.0: dotnet10.0: dotnet9.0: dotnet: .NET Security Feature Bypass Vulnerability
Summary: CVE-2026-96238 dotnet8.0: dotnet10.0: dotnet9.0: dotnet: .NET Security Featur...
Keywords:
Status: NEW
Alias: CVE-2026-96238
Deadline: 2026-10-13
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-09 19:59 UTC by Charles Timko
Modified: 2026-10-26 04:06 UTC (History)
3 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:86168 0 None None None 2026-10-20 21:36:38 UTC
Red Hat Product Errata RHSA-2026:86169 0 None None None 2026-10-20 22:46:42 UTC
Red Hat Product Errata RHSA-2026:86170 0 None None None 2026-10-20 21:55:11 UTC
Red Hat Product Errata RHSA-2026:86171 0 None None None 2026-10-20 22:50:08 UTC
Red Hat Product Errata RHSA-2026:86172 0 None None None 2026-10-20 21:43:25 UTC
Red Hat Product Errata RHSA-2026:86192 0 None None None 2026-10-20 21:58:42 UTC
Red Hat Product Errata RHSA-2026:86193 0 None None None 2026-10-20 22:55:54 UTC
Red Hat Product Errata RHSA-2026:86195 0 None None None 2026-10-20 21:40:48 UTC
Red Hat Product Errata RHSA-2026:86594 0 None None None 2026-10-21 03:42:10 UTC
Red Hat Product Errata RHSA-2026:88422 0 None None None 2026-10-22 22:10:15 UTC
Red Hat Product Errata RHSA-2026:88424 0 None None None 2026-10-22 22:01:22 UTC
Red Hat Product Errata RHSA-2026:88425 0 None None None 2026-10-22 22:08:09 UTC
Red Hat Product Errata RHSA-2026:88474 0 None None None 2026-10-22 23:24:21 UTC
Red Hat Product Errata RHSA-2026:89735 0 None None None 2026-10-26 04:06:59 UTC

Description Charles Timko 2026-10-09 19:59:23 UTC 
Origin validation error in .NET allows an unauthorized attacker to bypass a security feature over a network.

Affected products:
- .NET SDK (release 8.0): 8.0.400 - 8.0.425; fixed 8.0.426
- .NET SDK (release 8.0): 8.0.100 - 8.0.131; fixed 8.0.132
- .NET SDK (release 10.0): 10.0.400 - 10.0.401; fixed 10.0.402
- .NET SDK (release 9.0): 9.0.300 - 9.0.318; fixed 9.0.319
- .NET SDK (release 10.0): 10.0.100 - 10.0.112; fixed 10.0.113
- .NET SDK (release 11.0): 11.0.100-preview.1 - 11.0.100-rc.1; fixed 11.0.100-rc.2
- .NET SDK (release 9.0): 9.0.100 - 9.0.121; fixed 9.0.122
Comment 1 Jon Orris 2026-10-20 21:36:37 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:86168 https://access.redhat.com/errata/RHSA-2026:86168
Comment 2 Jon Orris 2026-10-20 21:40:47 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:86195 https://access.redhat.com/errata/RHSA-2026:86195
Comment 3 Jon Orris 2026-10-20 21:43:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:86172 https://access.redhat.com/errata/RHSA-2026:86172
Comment 4 Jon Orris 2026-10-20 21:55:10 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:86170 https://access.redhat.com/errata/RHSA-2026:86170
Comment 5 Jon Orris 2026-10-20 21:58:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:86192 https://access.redhat.com/errata/RHSA-2026:86192
Comment 6 Jon Orris 2026-10-20 22:46:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:86169 https://access.redhat.com/errata/RHSA-2026:86169
Comment 7 Jon Orris 2026-10-20 22:50:08 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:86171 https://access.redhat.com/errata/RHSA-2026:86171
Comment 8 Jon Orris 2026-10-20 22:55:53 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:86193 https://access.redhat.com/errata/RHSA-2026:86193
Comment 9 Jon Orris 2026-10-21 03:42:08 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:86594 https://access.redhat.com/errata/RHSA-2026:86594
Comment 14 Jon Orris 2026-10-22 22:01:21 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:88424 https://access.redhat.com/errata/RHSA-2026:88424
Comment 15 Jon Orris 2026-10-22 22:08:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:88425 https://access.redhat.com/errata/RHSA-2026:88425
Comment 16 Jon Orris 2026-10-22 22:10:14 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:88422 https://access.redhat.com/errata/RHSA-2026:88422
Comment 17 Jon Orris 2026-10-22 23:24:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:88474 https://access.redhat.com/errata/RHSA-2026:88474
Comment 18 Jon Orris 2026-10-26 04:06:58 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:89735 https://access.redhat.com/errata/RHSA-2026:89735
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