CVE-2026-84003

Published: Sep 8, 2026Modified: Sep 8, 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

Description

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

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

Timeline

No history available yet.