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CVE-2026-83947.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSHIGH / 7.7CVSS 3.1 · secure@microsoft.com
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSUndergoing AnalysisModified Oct 09, 2026

Disclosure summary

Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.

Source-reported weakness categories

CWE-862

Source-specific records & product guidance

Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.

NIST National Vulnerability Database · NVD-CVE-2026-83947

Open original source · Updated Oct 09, 2026

Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.

MSRC Security Update Guide · RSS-6a1c70bc454f9c813436b7edcf37cbd5ec5

Open original source · Updated Oct 08, 2026

CVE-2026-83947 Azure Event Grid Spoofing Vulnerability

CVE mention in publisher metadata; check the original affected versions.

Original records & references

PUBLISHED 2026-10-08T19:17:04-04:00
MODIFIED 2026-10-09T12:35:35-04:00
INGESTED 2026-10-10T20:55:12-04:00