CVE-2026-83947
Azure Event Grid Spoofing Vulnerability
Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Azure Event Grid Spoofing Vulnerability
Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.
- Record
CVE-2026-83947- CVSS 3.1
- 7.7 High
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 - Weakness
- CWE-862
- Updated
- 2026-11-02
EUVDEUVD-2026-95396
Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.
- Record
EUVD-2026-95396- CVSS 3.1
- 7.7 High
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-hf67-p98c-9g49
Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over...
Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.
- Record
GHSA-hf67-p98c-9g49- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N - Weakness
- CWE-862
- Updated
- 2026-11-02
NVD
Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.
- Record
CVE-2026-83947- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-862
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-83947 is a high vulnerability (CVSS 7.7) in Microsoft Azure Event Grid, published October 8, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.53%, the 44th percentile. No source names a fixed version.