CVE-2026-83947

Microsoft Azure Event Grid: missing authorisation

Risk score: 55/100
CVSS: 6.5 v3.1
Exploit chance (30 days): 0.4%
Published: 8 Oct 2026

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What to know

What it is: Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.
Affected: Microsoft Azure Event Grid
Fix: Apply the vendor's security update; see the linked advisory.
Exploitation: No known exploitation

Why it is Yellow

CVSS 6.5 medium
On your watchlist: azure

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83947

Original description

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

Last activity 8 Oct 2026. Patch Forecast updates every hour.