MSAL Node authorization code flow may disclose parameters to an attacker-controlled endpoint
### Impact 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. ### Patches Version 7.1.0 and higher are patched. ### Workarounds Ensure you pass in only the auth_code to to acquireTokenByCode
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-109461US | medium5.9 | — | ||
Origin validation error in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to disclose information over a network. | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/AzureAD/microsoft-authentication-library-for-jsPACKAGE
- https://github.com/AzureAD/microsoft-authentication-library-for-js/commit/f550958586475dbfeb1cd44be14a2d653728850eWEB
- https://github.com/AzureAD/microsoft-authentication-library-for-js/pull/8901WEB
- https://github.com/AzureAD/microsoft-authentication-library-for-js/releases/tag/msal-node-v7.1.0WEB
- https://github.com/AzureAD/microsoft-authentication-library-for-js/security/advisories/GHSA-xcx6-jx8p-x3h5WEB
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-109461WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-109461ADVISORY
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