{"id":"CVE-2026-83711","aliases":["EUVD-2026-70795","GHSA-w2qf-mqjq-8m33"],"status":"published","title":"Microsoft Azure Active Directory B2C Elevation of Privilege Vulnerability","description":"Authorization bypass through user-controlled key in Microsoft Azure Active Directory B2C allows an unauthorized attacker to elevate privileges over a network.","severity":{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00798,"percentile":0.56998,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-639"],"published":"2026-09-03T22:59:15Z","modified":"2026-11-10T21:38:36Z","products":[{"vendor":"microsoft","product":"azure_active_directory_b2c"},{"vendor":"microsoft","product":"entra"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83711","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-83711"},{"url":"https://github.com/advisories/GHSA-w2qf-mqjq-8m33"}],"sources":{"cve":[{"id":"CVE-2026-83711","title":"Microsoft Azure Active Directory B2C Elevation of Privilege Vulnerability","description":"Authorization bypass through user-controlled key in Microsoft Azure Active Directory B2C allows an unauthorized attacker to elevate privileges over a network.","status":"published","published":"2026-09-03T22:59:15.478Z","modified":"2026-11-10T21:38:36.149Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"critical","assessor":"cna"}],"cwes":["CWE-639"],"updated_at":"2026-11-10T22:48:54.14451Z"}],"euvd":[{"id":"EUVD-2026-70795","description":"Authorization bypass through user-controlled key in Microsoft Azure Active Directory B2C allows an unauthorized attacker to elevate privileges over a network.","status":"published","published":"2026-09-03T22:59:15Z","modified":"2026-11-10T21:38:36Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"critical"}],"updated_at":"2026-11-10T23:24:18.784503Z"}],"ghsa":[{"id":"GHSA-w2qf-mqjq-8m33","title":"Authorization bypass through user-controlled key in Microsoft Azure Active Directory B2C allows...","description":"Authorization bypass through user-controlled key in Microsoft Azure Active Directory B2C allows an unauthorized attacker to elevate privileges over a network.","status":"published","published":"2026-09-04T00:31:07Z","modified":"2026-09-04T00:31:10Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T15:11:21.315485Z"}],"nvd":[{"id":"CVE-2026-83711","description":"Authorization bypass through user-controlled key in Microsoft Azure Active Directory B2C allows an unauthorized attacker to elevate privileges over a network.","status":"published","published":"2026-09-03T23:17:20.5Z","modified":"2026-10-14T18:38:42.623Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"critical","assessor":"secondary"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T14:12:43.737972Z"}]}}