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-draft
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: 2026-10-19 18:47 UTC (History)
3 users (show)

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

Attachments (Terms of Use)

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
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