CVE-2026-84003

Microsoft Authentication Library (MSAL) for Node.js Spoofing Vulnerability

Published Sep 8, 2026 CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed
Description
Authentication bypass by capture-replay in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to perform spoofing over a network.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Microsoft azure\/msal-node
CPEs cpe:2.3:a:microsoft:azure\/msal-node:*:*:*:*:*:node.js:*:*
Vendors & Products Microsoft azure\/msal-node
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Authentication bypass by capture-replay in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to perform spoofing over a network.
Title Microsoft Authentication Library (MSAL) for Node.js Spoofing Vulnerability
First Time appeared Microsoft
Microsoft microsoft Authentication Library For Node.js
Weaknesses CWE-294
CPEs cpe:2.3:a:microsoft:microsoft_authentication_library_for_node.js:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft microsoft Authentication Library For Node.js
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Nov 10, 2026, 9:38 PM
Reserved
Sep 1, 2026, 1:16 AM
Status
Analyzed
Published
Sep 8, 2026, 6:21 PM
Modified
Sep 16, 2026, 2:06 PM