{"id":"CVE-2026-84003","aliases":["EUVD-2026-73922","GHSA-gmqm-6r28-m87v"],"status":"published","title":"Microsoft Authentication Library (MSAL) for Node.js Spoofing Vulnerability","description":"Authentication bypass by capture-replay in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to perform spoofing over a network.","severity":{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00599,"percentile":0.48991,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-294"],"published":"2026-09-08T17:19:32Z","modified":"2026-11-10T21:38:31Z","products":[{"vendor":"microsoft","product":"azure\\/msal-node"},{"vendor":"microsoft","product":"microsoft authentication library"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-84003","tags":["vendor-advisory","patch","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84003"},{"url":"https://github.com/advisories/GHSA-gmqm-6r28-m87v"}],"sources":{"cve":[{"id":"CVE-2026-84003","title":"Microsoft Authentication Library (MSAL) for Node.js Spoofing Vulnerability","description":"Authentication bypass by capture-replay in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2026-09-08T17:19:32.079Z","modified":"2026-11-10T21:38:31.783Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-294"],"updated_at":"2026-11-10T22:48:54.14451Z"}],"euvd":[{"id":"EUVD-2026-73922","description":"Authentication bypass by capture-replay in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2026-09-08T17:19:32Z","modified":"2026-11-10T21:38:31Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T23:24:18.784503Z"}],"ghsa":[{"id":"GHSA-gmqm-6r28-m87v","title":"Authentication bypass by capture-replay in Microsoft Authentication Library (MSAL) for Node.js...","description":"Authentication bypass by capture-replay in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2026-09-08T18:33:39Z","modified":"2026-09-08T18:34:15Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-294"],"updated_at":"2026-11-02T15:11:34.690977Z"}],"nvd":[{"id":"CVE-2026-84003","description":"Authentication bypass by capture-replay in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2026-09-08T18:21:11.363Z","modified":"2026-09-16T14:06:28.077Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-294"],"updated_at":"2026-11-02T14:12:45.264578Z"}],"osv":[{"id":"CVE-2026-84003","description":"Authentication bypass by capture-replay in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2026-09-08T18:21:11.363Z","modified":"2026-10-24T10:30:36.616828141Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:45:18.482949Z"}]}}