---
id: CVE-2026-109461
title: >-
  Microsoft Authentication Library (MSAL) for Node.js Information Disclosure
  Vulnerability
summary: >-
  Origin validation error in Microsoft Authentication Library (MSAL) for Node.js
  allows an unauthorized attacker to disclose information over a network.
severity: medium
cvss: 5.9
cvssVector: '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'
cvssSource: cna
cwe:
  - CWE-346
vendor: Microsoft
product: Microsoft Identity Client for NodeJS
affected:
  - identity_client_for_nodejs >= 5.0.0 < 7.1.0
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T23:27:20.706Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-109461'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-109461'
    label: >-
      Microsoft Authentication Library (MSAL) for Node.js Information Disclosure
      Vulnerability
tags:
  - cve.org
ingestedAt: '2026-10-16T18:43:08.658Z'
---

## Overview

Origin validation error in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to disclose information over a network.

## Affected

- `identity_client_for_nodejs >= 5.0.0 < 7.1.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.