Inconsistent interpretation of http requests ('http request/response smuggling') in .NET allows an unauthorized attacker to bypass a security feature over a network.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-r6mh-95jw-g7qg Microsoft Security Advisory CVE-2026-62899 – .NET Security Feature Bypass Vulnerability
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 17 Aug 2026 11:30:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft microsoft Visual Studio 2022
Microsoft microsoft Visual Studio 2026
Vendors & Products Microsoft microsoft Visual Studio 2022
Microsoft microsoft Visual Studio 2026

Fri, 14 Aug 2026 14:15:00 +0000

Type Values Removed Values Added
First Time appeared Apple
Apple macos
Linux
Linux linux Kernel
Microsoft windows
CPEs cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
Vendors & Products Apple
Apple macos
Linux
Linux linux Kernel
Microsoft windows

Wed, 12 Aug 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 12 Aug 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 11 Aug 2026 17:15:00 +0000

Type Values Removed Values Added
Description Inconsistent interpretation of http requests ('http request/response smuggling') in .NET allows an unauthorized attacker to bypass a security feature over a network.
Title .NET Security Feature Bypass Vulnerability
First Time appeared Microsoft
Microsoft .net
Microsoft visual Studio 2022
Microsoft visual Studio 2026
Weaknesses CWE-444
CPEs cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft .net
Microsoft visual Studio 2022
Microsoft visual Studio 2026
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-09-16T16:24:08.049Z

Reserved: 2026-07-14T21:25:21.035Z

Link: CVE-2026-62899

cve-icon Vulnrichment

Updated: 2026-08-12T13:50:47.289Z

cve-icon NVD

Status : Analyzed

Published: 2026-08-11T17:18:44.120

Modified: 2026-08-14T13:56:52.390

Link: CVE-2026-62899

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-08-11T00:00:00Z

Links: CVE-2026-62899 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-17T11:15:03Z

Weaknesses