{"id":"CVE-2026-40379","aliases":["EUVD-2026-29655","GHSA-xq38-4286-vwhm"],"status":"published","title":"Azure Entra ID Spoofing Vulnerability","description":"Exposure of sensitive information to an unauthorized actor in Azure Entra ID allows an unauthorized attacker to perform spoofing over a network.","severity":{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0091,"percentile":0.60401,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200"],"published":"2026-05-12T16:58:10Z","modified":"2026-10-26T18:10:00Z","products":[{"vendor":"microsoft","product":"entra_id"},{"vendor":"microsoft","product":"microsoft entra"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40379","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40379"},{"url":"https://github.com/advisories/GHSA-xq38-4286-vwhm"}],"sources":{"cve":[{"id":"CVE-2026-40379","title":"Azure Entra ID Spoofing Vulnerability","description":"Exposure of sensitive information to an unauthorized actor in Azure Entra ID allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2026-05-12T16:58:10.399Z","modified":"2026-08-10T15:12:24.952Z","cvss":[{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"critical","assessor":"cna"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T13:43:11.445168Z"}],"euvd":[{"id":"EUVD-2026-29655","description":"Exposure of sensitive information to an unauthorized actor in Azure Entra ID allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2026-05-12T16:58:10Z","modified":"2026-08-10T15:12:24Z","cvss":[{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"critical"}],"updated_at":"2026-11-02T18:02:03.332437Z"}],"ghsa":[{"id":"GHSA-xq38-4286-vwhm","title":"Exposure of sensitive information to an unauthorized actor in Azure Entra ID allows an...","description":"Exposure of sensitive information to an unauthorized actor in Azure Entra ID allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2026-05-12T18:30:45Z","modified":"2026-05-12T18:30:51Z","cvss":[{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T15:08:05.647564Z"}],"nvd":[{"id":"CVE-2026-40379","description":"Exposure of sensitive information to an unauthorized actor in Azure Entra ID allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2026-05-12T18:17:16.663Z","modified":"2026-10-26T18:10:00.173Z","cvss":[{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","level":"critical","assessor":"secondary"},{"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","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:12:18.613259Z"}]}}