CVE-2026-118746: .NET Security Feature Bypass Vulnerability
Published Nov 10, 2026
·Updated
.NET Security Feature Bypass Vulnerability
Other sources
Not failing securely ('failing open') in .NET allows an unauthorized attacker to bypass a security feature over a network.
— Microsoft
Affected Software
4 affected componentsFixes available
All of the following
Microsoft .NET>=11.0<11.0.0
11.0.0
Linux Linux*
All of the following
Microsoft .NET>=11.0<11.0.0
11.0.0
Apple macOS*
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 11.0.0
Event History
Nov 10, 2026
CVE Published
via Microsoft·04:00 PM
Data Sourced
via Microsoft·04:00 PM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·04:00 PM
Affected Software
CVE Published
via MITRE·06:21 PM
Data Sourced
via MITRE·06:21 PM
DescriptionSeverity
Data Sourced
via NVD·07:19 PM
DescriptionSeverityWeakness