CVE-2026-62899 PUBLISHED

.NET Security Feature Bypass Vulnerability

Assigner: microsoft
Reserved: 14.07.2026 Published: 11.08.2026 Updated: 11.08.2026

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

Metrics

CVSS 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
CVSS Score: 5.9

Product Status

Vendor Microsoft
Product .NET 10.0
Versions
  • affected from 10.0.0 to 10.0.11 (excl.)
Vendor Microsoft
Product .NET 8.0
Versions
  • affected from 8.0.0 to 8.0.30 (excl.)
Vendor Microsoft
Product .NET 9.0
Versions
  • affected from 9.0.0 to 9.0.19 (excl.)
Vendor Microsoft
Product Microsoft Visual Studio 2022 version 17.14
Versions
  • affected from 17.14.0 to 17.14.38 (excl.)
Vendor Microsoft
Product Microsoft Visual Studio 2026 version 18.8
Versions
  • affected from 18.0 to 18.8.3 (excl.)

References

Problem Types