{"id":"CVE-2026-83947","aliases":["EUVD-2026-95396","GHSA-hf67-p98c-9g49"],"status":"published","title":"Azure Event Grid Spoofing Vulnerability","description":"Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.","severity":{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00528,"percentile":0.45177,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-862"],"published":"2026-10-08T22:15:31Z","modified":"2026-11-10T20:46:42Z","products":[{"vendor":"microsoft","product":"azure event grid system"},{"vendor":"microsoft","product":"azure_event_grid"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83947","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-83947"},{"url":"https://github.com/advisories/GHSA-hf67-p98c-9g49"}],"sources":{"cve":[{"id":"CVE-2026-83947","title":"Azure Event Grid Spoofing Vulnerability","description":"Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.","status":"published","published":"2026-10-08T22:15:31.809Z","modified":"2026-11-10T20:46:42.205Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-862"],"updated_at":"2026-11-10T22:18:29.471829Z"}],"euvd":[{"id":"EUVD-2026-95396","description":"Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.","status":"published","published":"2026-10-08T22:15:31Z","modified":"2026-11-10T20:46:42Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T22:23:55.284051Z"}],"ghsa":[{"id":"GHSA-hf67-p98c-9g49","title":"Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over...","description":"Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.","status":"published","published":"2026-10-09T00:31:48Z","modified":"2026-10-09T00:31:56Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T15:12:59.31428Z"}],"nvd":[{"id":"CVE-2026-83947","description":"Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.","status":"published","published":"2026-10-08T23:17:04.423Z","modified":"2026-10-15T18:41:18.72Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T14:12:55.473789Z"}]}}