CVSS 3.1
6.8 mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:NCVE-2026-118746 .NET Security Feature Bypass Vulnerability
Medium (6.8) in microsoft. EPSS 0.7% estimated probability of exploitation activity in the next 30 days.
On this page
Not failing securely ('failing open') in .NET allows an unauthorized attacker to bypass a security feature over a network.
Severity
- EPSS
- 0.7% estimated probability of exploitation activity in the next 30 days; 52nd percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CISA's assessment (SSVC)
- Exploitation: none · Automatable: no · Technical impact: total, assessed 2026-11-10. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWE
- CWE-636 Not Failing Securely (Failing Open)
- OWASP Top 10
- A10:2025 Mishandling of Exceptional Conditions
- Published
- Modified
- Assigned by
- microsoft (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Affected
- microsoft:.net 11.0 installed on linux
- microsoft:.net 11.0 installed on mac os
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| Microsoft .NET 11.0 installed on Linux | from 11.0.0-preview.1 before 11.0.0 |
| Microsoft .NET 11.0 installed on Mac OS | from 11.0.0-preview.1 before 11.0.0 |
Fix and patched versions
Linux distributions
| Distribution | Release | Package | Fixed in | Advisory |
|---|---|---|---|---|
| Ubuntu | 22.04:LTS | dotnet7 | no fix listed | UBUNTU-CVE-2026-118746 |
| Ubuntu | 22.04:LTS | dotnet8 | 8.0.134-8.0.34-0ubuntu1~22.04.1 | USN-9042-1 |
| Ubuntu | 24.04:LTS | dotnet10 | 10.0.115-10.0.15-0ubuntu1~24.04.1 | USN-9042-1 |
| Ubuntu | 24.04:LTS | dotnet8 | 8.0.134-8.0.34-0ubuntu1~24.04.1 | USN-9042-1 |
| Ubuntu | 26.04:LTS | dotnet10 | 10.0.115-10.0.15-0ubuntu1~26.04.1 | USN-9042-1 |
| Ubuntu | 26.10 | dotnet10 | 10.0.115-10.0.15-0ubuntu1~26.10.1 | USN-9042-1 |
| Ubuntu | 26.10 | dotnet11 | 11.0.100-11.0.0-0ubuntu1~26.10.1 | UBUNTU-CVE-2026-118746 USN-9042-1 |
From the distributions' data via OSV.dev: Ubuntu Security Notices © Canonical Ltd., CC BY-SA 4.0. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Ubuntu.
Red Hat
Red Hat rates this Important.
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | dotnet11.0 | Affected | |
| Red Hat Enterprise Linux 8 | dotnet11.0 | Affected | |
| Red Hat Enterprise Linux 9 | dotnet11.0 | Affected |
Contains Red Hat Security Data © Red Hat, Inc., licensed under CC BY 4.0. Source: https://access.redhat.com/security/data. Modified: reformatted. Red Hat's page for CVE-2026-118746.