Bug 2548796 (CVE-2026-70188) - CVE-2026-70188 dotnet: ASP.NET Core Security Feature Bypass Vulnerability
Summary: CVE-2026-70188 dotnet: ASP.NET Core Security Feature Bypass Vulnerability
Keywords:
Status: NEW
Alias: CVE-2026-70188
Deadline: 2026-10-13
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
urgent
urgent
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2554723 2554724 2554725
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-09 19:33 UTC by Charles Timko
Modified: 2026-10-19 18:03 UTC (History)
3 users (show)

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

Attachments (Terms of Use)

Description Charles Timko 2026-10-09 19:33:32 UTC 
Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an unauthorized attacker to bypass a security feature over a network.

Affected products:
- ASP.NET Core Runtime (release 10.0): 10.0.0 - 10.0.12; fixed 10.0.13
- ASP.NET Core Runtime (release 8.0): 8.0.0 - 8.0.31; fixed 8.0.32
- ASP.NET Core Runtime (release 11.0): 11.0.0-preview.1 - 11.0.0-rc.1; fixed 11.0.0-rc.2
- ASP.NET Core Runtime (release 9.0): 9.0.0 - 9.0.20; fixed 9.0.21
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