Vulnerability DatabaseCVE-2026-62899
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CVE-2026-62899
Published:August 11, 2026
Updated:September 01, 2026
Inconsistent interpretation of http requests ('http request/response smuggling') in .NET allows an unauthorized attacker to bypass a security feature over a network.
Affected Packages
microsoft.netcore.app.runtime.osx-x64 (NUGET):
Affected version(s) >=10.0.0 <10.0.11
Fix Suggestion:
Update to version 10.0.11
microsoft.netcore.app.runtime.linux-x64 (NUGET):
Affected version(s) >=10.0.0 <10.0.11
Fix Suggestion:
Update to version 10.0.11
microsoft.netcore.app.runtime.osx-arm64 (NUGET):
Affected version(s) >=8.0.0 <8.0.30
Fix Suggestion:
Update to version 8.0.30
microsoft.netcore.app.runtime.linux-x64 (NUGET):
Affected version(s) >=8.0.0 <8.0.30
Fix Suggestion:
Update to version 8.0.30
microsoft.netcore.app.runtime.osx-x64 (NUGET):
Affected version(s) >=8.0.0 <8.0.30
Fix Suggestion:
Update to version 8.0.30
microsoft.netcore.app.runtime.osx-arm64 (NUGET):
Affected version(s) >=9.0.0 <9.0.19
Fix Suggestion:
Update to version 9.0.19
microsoft.netcore.app.runtime.linux-arm (NUGET):
Affected version(s) >=10.0.0 <10.0.11
Fix Suggestion:
Update to version 10.0.11
microsoft.netcore.app.runtime.linux-musl-x64 (NUGET):
Affected version(s) >=8.0.0 <8.0.30
Fix Suggestion:
Update to version 8.0.30
microsoft.netcore.app.runtime.linux-arm64 (NUGET):
Affected version(s) >=10.0.0 <10.0.11
Fix Suggestion:
Update to version 10.0.11
microsoft.netcore.app.runtime.linux-musl-arm (NUGET):
Affected version(s) >=8.0.0 <8.0.30
Fix Suggestion:
Update to version 8.0.30
microsoft.netcore.app.runtime.linux-musl-arm (NUGET):
Affected version(s) >=9.0.0 <9.0.19
Fix Suggestion:
Update to version 9.0.19
microsoft.netcore.app.runtime.linux-musl-x64 (NUGET):
Affected version(s) >=10.0.0 <10.0.11
Fix Suggestion:
Update to version 10.0.11
microsoft.netcore.app.runtime.linux-arm (NUGET):
Affected version(s) >=8.0.0 <8.0.30
Fix Suggestion:
Update to version 8.0.30
microsoft.netcore.app.runtime.linux-arm64 (NUGET):
Affected version(s) >=9.0.0 <9.0.19
Fix Suggestion:
Update to version 9.0.19
microsoft.netcore.app.runtime.linux-musl-x64 (NUGET):
Affected version(s) >=9.0.0 <9.0.19
Fix Suggestion:
Update to version 9.0.19
microsoft.netcore.app.runtime.linux-arm64 (NUGET):
Affected version(s) >=8.0.0 <8.0.30
Fix Suggestion:
Update to version 8.0.30
microsoft.netcore.app.runtime.osx-x64 (NUGET):
Affected version(s) >=9.0.0 <9.0.19
Fix Suggestion:
Update to version 9.0.19
microsoft.netcore.app.runtime.linux-x64 (NUGET):
Affected version(s) >=9.0.0 <9.0.19
Fix Suggestion:
Update to version 9.0.19
microsoft.netcore.app.runtime.linux-musl-arm64 (NUGET):
Affected version(s) >=9.0.0 <9.0.19
Fix Suggestion:
Update to version 9.0.19
microsoft.netcore.app.runtime.linux-musl-arm64 (NUGET):
Affected version(s) >=10.0.0 <10.0.11
Fix Suggestion:
Update to version 10.0.11
microsoft.netcore.app.runtime.linux-musl-arm (NUGET):
Affected version(s) >=10.0.0 <10.0.11
Fix Suggestion:
Update to version 10.0.11
microsoft.netcore.app.runtime.linux-musl-arm64 (NUGET):
Affected version(s) >=8.0.0 <8.0.30
Fix Suggestion:
Update to version 8.0.30
microsoft.netcore.app.runtime.linux-arm (NUGET):
Affected version(s) >=9.0.0 <9.0.19
Fix Suggestion:
Update to version 9.0.19
microsoft.netcore.app.runtime.osx-arm64 (NUGET):
Affected version(s) >=10.0.0 <10.0.11
Fix Suggestion:
Update to version 10.0.11
Related Resources (5)
https://github.com/dotnet/runtime
https://github.com/dotnet/runtime/security/advisories/GHSA-r6mh-95jw-g7qg
https://nvd.nist.gov/vuln/detail/CVE-2026-62899
https://github.com/dotnet/announcements/issues/427
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62899
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CVSS v4
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Exploit Maturity
UNPROVEN
Weakness Type (CWE)
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
CWE-444
EPSS
Base Score:
0.71