CVE-2026-84003

Published: Sep 8, 2026Modified: Sep 16, 2026

7.4

Vector

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

Exploitability: 2.2 / Impact: 5.2

Source: secure@microsoft.com (Secondary)

Description

Authentication bypass by capture-replay in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to perform spoofing over a network.

Affected (1)

Products: Microsoft: Azure/msal Node

Microsoft

1 product

Azure/msal Node

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Microsoft Azure/msal Node	version < 5.6.0

Related CWEs

CWE-294

Authentication Bypass by Capture-replay

A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes).

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-84003

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.