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

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact None

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Microsoft Azure Event Grid System affected
Version Status Constraints
- affected —

No data.

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Project Subscriptions

Vendors Products
Microsoft Subscribe
Azure Event Grid System Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83947 cve-icon
History

Thu, 08 Oct 2026 22:30:00 +0000

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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-10-08T22:15:31.809Z

Reserved: 2026-08-31T23:40:59.641Z

Link: CVE-2026-83947

cve-icon Vulnrichment

No data.

cve-icon NVD

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cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses