CVE-2026-62899
.NET Security Feature Bypass Vulnerability
At a glance Severity MEDIUM 5.9 EPSS EPSS 0.75 % · percentile 55 (2026-10-27) State PUBLISHED Published 2026-08-11 Updated 2026-10-21 Assigner microsoft NVD status Analyzed Description Inconsistent interpretation of http requests ('http request/response smuggling') in .NET allows an unauthorized attacker to bypass a security feature over a network.
Scores Version Score Vector Scored by CVSS 3.1 MEDIUM 5.9 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 microsoft CVSS 3.1 MEDIUM 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N NVD · secure@microsoft.com (Secondary)
Weaknesses (CWE)
Advisories GHSA-r6mh-95jw-g7qg — Microsoft Security Advisory CVE-2026-62899 – .NET Security Feature Bypass VulnerabilityEuropean references
CERT-FR advisories
Affected configurations (NVD CPE) cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:* ≥ 17.14.0 < 17.14.38cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:* ≥ 18.8.0 < 18.8.3cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* ≥ 8.0.0 < 8.0.30cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* ≥ 9.0.0 < 9.0.19cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* ≥ 10.0.0 < 10.0.11Affected products
References
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