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CVE-2026-109461— Microsoft Authentication Library (MSAL) for Node.js Information Disclosure Vulnerability

Quick assessment

Affected
Microsoft Microsoft Identity Client for NodeJS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Authentication Library (MSAL) for Node.js 存在起源验证错误，允许未经授权的攻击者通过网络泄露信息。

CVSS 5.9 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Microsoft Microsoft Identity Client for NodeJS 1.0.0< 7.1.0 affected
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I. Basic Information for CVE-2026-109461

Vulnerability Information
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Vulnerability Title
Microsoft Authentication Library (MSAL) for Node.js Information Disclosure Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Origin validation error in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to disclose information over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Microsoft Identity Client for NodeJS 5.0.0 ~ 7.1.0 -

II. Public POCs for CVE-2026-109461

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III. Intelligence Information for CVE-2026-109461

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Vendor Advisories for CVE-2026-109461 (1)

IV. Related Vulnerabilities

Same vendor: Microsoft
Same weakness: CWE-346

V. Comments for CVE-2026-109461

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