Quick answers
- Is CVE-2026-118746 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-118746 being exploited in the wild.
- How severe is CVE-2026-118746?
- Medium severity, with a CVSS score of 6.8, published 10 November 2026.
- Which products and versions are affected?
- Microsoft.NetCore.App.Runtime.linux-arm (NuGet) >= 11.0.0-preview.1, < 11.0.0-preview.7.26381.103; Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet) >= 11.0.0-preview.1, < 11.0.0-preview.7.26381.103; Microsoft.NetCore.App.Runtime.linux-musl-arm (NuGet) >= 11.0.0-preview.1, < 11.0.0-preview.7.26381.103; Microsoft.NetCore.App.Runtime.linux-musl-arm64 (NuGet) >= 11.0.0-preview.1, < 11.0.0-preview.7.26381.103; and 4 more.
- Is there a fix for CVE-2026-118746?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-118746 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-118746?
- Check whether you run Microsoft .Net, Microsoft.NetCore.App.Runtime.linux-arm (NuGet), Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a failing-open/insecure failure mode in .NET where a security feature does not fail securely, allowing an unauthorized attacker to bypass it via a network vector. The attack requires no authentication or user interaction and affects the confidentiality and integrity of the application.
Affected products
- Microsoft .NET
Identifiers
- CVE-2026-118746
- GHSA-ff4h-7rhj-jrjf
Timeline
- 2026-11-10: disclosed