CVE-2026-109461: CWE-346: Origin Validation Error in Microsoft Microsoft Identity Client for NodeJS
Description
Origin validation error in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to disclose information over a network.
CVSS v3.1
Score 5.9medium
Affected software
Microsoft
Microsoft Identity Client for NodeJS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, tracked as CVE-2026-109461 and categorized under CWE-346 (Origin Validation Error), exists in Microsoft Identity Client for NodeJS. It allows unauthorized information disclosure due to improper origin validation in the Microsoft Authentication Library for Node.js. The issue affects versions >=1.0.0 and <7.1.0. Microsoft has published an official fix for this vulnerability.
Potential Impact
An attacker can exploit this origin validation error to disclose sensitive information over the network without requiring privileges or user interaction. The CVSS 3.1 base score is 5.9 (medium severity), reflecting network attack vector with high attack complexity and no privileges required. The impact is limited to confidentiality loss; integrity and availability are not affected.
Mitigation Recommendations
An official fix is available from Microsoft. Users of Microsoft Identity Client for NodeJS should update to version 7.1.0 or later to remediate this vulnerability. Refer to the Microsoft security advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-109461 for detailed patch and update instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-10-12T17:01:11.370Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-109461","vendor":"Microsoft"}]
Threat ID: 6ad260872cdf04f65616625d
Added to database: 10/16/2026, 17:36:07 UTC
Last enriched: 10/16/2026, 17:48:25 UTC
Last updated: 10/16/2026, 18:05:00 UTC
Views: 5
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