CVE-2026-62899CWE-444

CVE-2026-62899

Medium · published August 11, 2026

CVSS v3.1
5.9
EPSS
1%
Percentile
54.4
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
5.9 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00749 · 54.4th percentile
Weakness
CWE-444 · Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Published
2026-08-11T21:18Z
Affected products (5)
ProductVersionsFixed in
microsoft/visual_studio_2022≥ 17.14.0, < 17.14.3817.14.38
microsoft/visual_studio_2026≥ 18.8.0, < 18.8.318.8.3
microsoft/.net≥ 8.0.0, < 8.0.308.0.30
microsoft/.net≥ 9.0.0, < 9.0.199.0.19
microsoft/.net≥ 10.0.0, < 10.0.1110.0.11
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62899 · [email protected]
EPSS history
Timeline
  • 11 AUG 17:04Z
    .NET Security Feature Bypass Vulnerability
    cvelistv5