What’s Vulnerable › Vulnerabilities

CVE-2026-83947: Azure Event Grid Spoofing Vulnerability

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-08 · updated 2026-10-31
• Weakness: CWE-862

Description

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

Affected products

• Microsoft Azure Event Grid System: all versions
• Microsoft Azure Event Grid System: all versions

References

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

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