---
title: "CVE-2026-69843: Microsoft Fabric - Authentication Bypass"
description: "Microsoft Fabric contains an authentication bypass caused by spoofing, letting unauthorized attackers elevate privileges over a network, exploit requires network access."
url: https://panop.io/threat-heartbeat/CVE-2026-69843/
---

# CVE-2026-69843 Microsoft Fabric - Authentication Bypass

Microsoft Fabric contains an authentication bypass caused by spoofing, letting unauthorized attackers elevate privileges over a network, exploit requires network access.

CVSS base score 10.0 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.90% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-69843)

## Details

Type

Authentication Bypass

Impact

Privilege Escalation

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Published

18 September 2026

Updated

15 October 2026

Weakness

[CWE-290](https://cwe.mitre.org/data/definitions/290.html)

## Vendor fix

Update to the latest version of Microsoft Fabric.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-69843](https://nvd.nist.gov/vuln/detail/CVE-2026-69843)
- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69843](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69843)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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