{"id":"CVE-2026-109461","aliases":["EUVD-2026-102952","GHSA-xcx6-jx8p-x3h5","ROOT-APP-NPM-CVE-2026-109461"],"status":"published","title":"Microsoft Authentication Library (MSAL) for Node.js Information Disclosure Vulnerability","description":"Origin validation error in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to disclose information over a network.","severity":{"version":"3.1","score":5.9,"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00361,"percentile":0.30232,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-346"],"published":"2026-10-16T17:11:24Z","modified":"2026-11-10T20:47:16Z","fixes":[{"ecosystem":"npm","package":"@azure/msal-node","fixed_in":["7.1.0"],"sources":["ghsa","osv"]},{"ecosystem":"Root:npm","package":"@azure/msal-node","fixed_in":["5.6.0-aikido.1","5.1.5-aikido.1"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"@rootio/azure__msal-node","fixed_in":["5.6.0-root.io.1","5.1.5-root.io.1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"@azure/msal-node","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0-beta.0"},{"fixed":"7.1.0"}]}]},{"source":"osv","ecosystem":"npm","package":"@azure/msal-node","ranges":[{"type":"SEMVER","events":[{"introduced":"5.0.0-beta.0"},{"fixed":"7.1.0"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@azure/msal-node","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.6.0-aikido.1"},{"fixed":"5.1.5-aikido.1"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@rootio/azure__msal-node","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.6.0-root.io.1"},{"fixed":"5.1.5-root.io.1"}]}]}],"products":[{"vendor":"microsoft","product":"microsoft identity client for nodejs"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-109461","tags":["vendor-advisory","patch","web"]},{"url":"https://github.com/AzureAD/microsoft-authentication-library-for-js/security/advisories/GHSA-xcx6-jx8p-x3h5","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109461","tags":["advisory"]},{"url":"https://github.com/AzureAD/microsoft-authentication-library-for-js/pull/8901","tags":["web"]},{"url":"https://github.com/AzureAD/microsoft-authentication-library-for-js/commit/f550958586475dbfeb1cd44be14a2d653728850e","tags":["web"]},{"url":"https://github.com/AzureAD/microsoft-authentication-library-for-js/releases/tag/msal-node-v7.1.0","tags":["web"]},{"url":"https://github.com/advisories/GHSA-xcx6-jx8p-x3h5"},{"url":"https://github.com/AzureAD/microsoft-authentication-library-for-js","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-109461","title":"Microsoft Authentication Library (MSAL) for Node.js Information Disclosure Vulnerability","description":"Origin validation error in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-10-16T17:11:24.532Z","modified":"2026-11-10T20:47:16.392Z","cvss":[{"version":"3.1","score":5.9,"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","level":"medium","assessor":"cna"}],"cwes":["CWE-346"],"updated_at":"2026-11-10T22:18:25.731086Z"}],"euvd":[{"id":"EUVD-2026-102952","description":"Origin validation error in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-10-16T17:11:24Z","modified":"2026-11-10T20:47:16Z","cvss":[{"version":"3.1","score":5.9,"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","level":"medium"}],"updated_at":"2026-11-10T22:23:55.284051Z"}],"ghsa":[{"id":"GHSA-xcx6-jx8p-x3h5","title":"MSAL Node authorization code flow may disclose parameters to an attacker-controlled endpoint","description":"### Impact\n\nOrigin 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.\n\n### Patches\n\nVersion 7.1.0 and higher are patched.\n\n### Workarounds\n\nEnsure you pass in only the auth_code to to acquireTokenByCode","status":"published","published":"2026-10-23T22:16:44Z","modified":"2026-10-23T22:16:45Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-346"],"updated_at":"2026-11-02T14:41:36.858527Z"}],"nvd":[{"id":"CVE-2026-109461","description":"Origin validation error in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-10-16T18:17:31.15Z","modified":"2026-10-18T12:17:05.34Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-346"],"updated_at":"2026-11-02T14:13:00.123071Z"}],"osv":[{"id":"GHSA-xcx6-jx8p-x3h5","title":"MSAL Node authorization code flow may disclose parameters to an attacker-controlled endpoint","description":"### Impact\n\nOrigin 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.\n\n### Patches\n\nVersion 7.1.0 and higher are patched.\n\n### Workarounds\n\nEnsure you pass in only the auth_code to to acquireTokenByCode","status":"published","published":"2026-10-23T22:16:44Z","modified":"2026-10-23T22:30:05.010413241Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-346"],"updated_at":"2026-11-02T15:46:59.835583Z"},{"id":"ROOT-APP-NPM-CVE-2026-109461","title":"CVE-2026-109461 in @azure/msal-node - Patched by Root","description":"Root has patched CVE-2026-109461 in the @azure/msal-node package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-10-28T12:59:02Z","modified":"2026-10-28T13:15:06.837703426Z","updated_at":"2026-11-02T15:53:27.362922Z"}]}}