---
id: CVE-2026-69843
title: >-
  Authentication bypass by spoofing in Microsoft Fabric allows an unauthorized
  attacker to elevate privileges over a network.
summary: >-
  Authentication bypass by spoofing in Microsoft Fabric allows an unauthorized
  attacker to elevate privileges over a network.
severity: critical
cvss: 10
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-290
vendor: Microsoft
product: Microsoft Fabric
affected:
  - fabric -
published: '2026-09-18'
updated: '2026-09-19'
sourceUpdated: '2026-09-19T04:17:55.650'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-69843'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69843'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-18T13:35:44.206498Z'
epss: 0.00623
epssPercentile: 0.48184
ingestedAt: '2026-09-17T23:31:20.693Z'
---

## Overview

Authentication bypass by spoofing in Microsoft Fabric allows an unauthorized attacker to elevate privileges over a network.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.