CVE-2026-84003: Microsoft Azure/msal-Node

High severity, CVSS 7.4. EPSS: 0.6% chance of exploitation in the next 30 days.

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

Affected products

• Microsoft Azure/msal-Node: before 5.6.0 (fixed in 5.6.0)

Published 2026-09-08. Last modified 2026-09-16.