Vulnerability · Published Oct 16, 2026 · Assigned by microsoft
CVE-2026-109461Microsoft Authentication Library (MSAL) for Node.js Information Disclosure Vulnerability
Medium 5.9
In plain English
A medium-severity security flaw in Microsoft Identity Client for NodeJS from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.4%top 69.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Origin validation error in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to disclose information over a network.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @azure/msal-node | 7.1.0 | GHSA-xcx6-jx8p-x3h5 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Identity Client for NodeJS | 5.0.0 – before 7.1.0 |
Weakness: CWE-346 · 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
References
- Microsoft Authentication Library (MSAL) for Node.js Information Disclosure Vulnerability vendor-advisory, patch