CVE-2026-83947

Azure Event Grid Spoofing Vulnerability

Published Oct 8, 2026 CVSS 3.1 · 7.7 High EPSS < 1% KEV · Not listed
Description
Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Microsoft azure Event Grid
CPEs cpe:2.3:a:microsoft:azure_event_grid:-:*:*:*:*:*:*:*
Vendors & Products Microsoft azure Event Grid
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.
Title Azure Event Grid Spoofing Vulnerability
First Time appeared Microsoft
Microsoft azure Event Grid System
Weaknesses CWE-862
CPEs cpe:2.3:a:microsoft:azure_event_grid_system:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft azure Event Grid System
References
Metrics cvssV3_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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Nov 10, 2026, 8:46 PM
Reserved
Aug 31, 2026, 11:40 PM
Status
Analyzed
Published
Oct 8, 2026, 11:17 PM
Modified
Oct 15, 2026, 6:41 PM