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Medium 5.9Published Oct 16, 2026
CVE-2026-109461Microsoft Authentication Library (MSAL) for Node.js Information Disclosure Vulnerability
Updated under an hour ago ()
Does this affect you?
It affects Microsoft Identity Client for NodeJS. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Origin validation error in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to disclose information over a network.
- CVSS
- 5.9 MEDIUM (v3.1, CNA)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
- Weakness (CWE)
- CWE-346
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- microsoft
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 16, 2026
Affected products
Microsoft Microsoft Identity Client for NodeJS microsoft:identity_client_for_nodejs (from the name) | from 5.0.0 before 7.1.0 | CNA record |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-109461vendor-advisory, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.