---
id: "CVE-2026-118746"
page: "https://infrastack.ai/live/CVE-2026-118746"
kind: "vulnerability"
aliases: ["CVE-2026-118746"]
title: ".NET: fail-open flaw lets a network attacker bypass a security feature"
severity: "medium"
cvss: 6.8
epss: null
exploited: false
status: "open"
category: "runtime"
products: [{"name": ".NET", "fixed": [], "affected": "", "ecosystem": "runtime"}]
ecosystems: ["runtime"]
tags: ["dotnet", "runtime"]
not_affected_if: []
published_at: "2026-11-10T19:19:51+00:00"
first_seen_at: "2026-11-10T19:24:55+00:00"
updated_at: "2026-11-10T19:55:46+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118746", "first_seen_at": "2026-11-10T19:24:55+00:00"}]
exploit_sources: []
---

# .NET: fail-open flaw lets a network attacker bypass a security feature

Link for people: https://infrastack.ai/live/CVE-2026-118746 (this .md is for agents)

A fail-open error in .NET lets an unauthorized attacker bypass a security feature over the network. The sources do not name the affected .NET versions or the specific feature.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- runtime:.NET affected range not listed fixed no fixed version listed

## Timeline

- 2026-11-10T19:24:55+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-118746

## From the sources

Not failing securely ('failing open') in .NET allows an unauthorized attacker to bypass a security feature over a network.

---

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