Description
Inconsistent interpretation of http requests ('http request/response smuggling') in .NET allows an unauthorized attacker to bypass a security feature over a network.
Affected products
microsoft: visual studio 2022; microsoft: visual studio 2026; microsoft: .net; apple: macos; linux: linux kernel; microsoft: windows
References1
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62899 PatchVendor Advisory
Metrics
- CVSS 3.1
-
5.9
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS — exploit probability
- 1% percentile: 55 · as of 12 November 2026
- CWE
- CWE-444
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.