CVE-2026-109461

Microsoft Authentication Library (MSAL) for Node.js Information Disclosure Vulnerability

Published Oct 16, 2026 CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed
Description
Origin validation error in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to disclose information over a network.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-xcx6-jx8p-x3h5 MSAL Node authorization code flow may disclose parameters to an attacker-controlled endpoint
History
Type Values Removed Values Added
First Time appeared Microsoft microsoft Authentication Library For Node.js
Vendors & Products Microsoft microsoft Authentication Library For Node.js
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
Description Origin validation error in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to disclose information over a network.
Title Microsoft Authentication Library (MSAL) for Node.js Information Disclosure Vulnerability
First Time appeared Microsoft
Microsoft microsoft Identity Client For Nodejs
Weaknesses CWE-346
CPEs cpe:2.3:a:microsoft:microsoft_identity_client_for_nodejs:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft microsoft Identity Client For Nodejs
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Nov 10, 2026, 8:47 PM
Reserved
Oct 12, 2026, 5:01 PM
Status
Awaiting Analysis
Published
Oct 16, 2026, 6:17 PM
Modified
Oct 18, 2026, 12:17 PM