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A GitHub-reviewed security advisory, not necessarily under active exploitation the way our CISA KEV advisories are, but a real, disclosed vulnerability in an open-source dependency.
Affected packages
Vulnerable: >= 5.0.0-beta.0, < 7.1.0
Patched in 7.1.0
Details
Origin validation error in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to disclose information over a network. This affects the auth_code flow.
Version 7.1.0 and higher are patched.
Ensure you pass in only the auth_code to to acquireTokenByCode
EPSS, exploit probability
Low0.35%
estimated chance of real-world exploitation in the next 30 days, higher than 27.1% of every CVE FIRST.org scores
Refreshed 10/24/2026, via FIRST.org's EPSS model, not CVSS, this measures likelihood of exploitation, not how severe it would be.
Talk to us about this
Find out whether this dependency (or others like it) is actually reachable in your codebase.
Get help patching, or building dependency-scanning into your pipeline going forward.
A secure code review or supply chain review finds this before an advisory does.