Vulnerability · Published Oct 8, 2026 · Assigned by microsoft
CVE-2026-83947Azure Event Grid Spoofing Vulnerability
High 7.7
In plain English
A high-severity missing authorization in Azure Event Grid System from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).
Severity (CVSS 3.1)7.7High
Exploit odds (30 days)0.5%top 55.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Azure Event Grid System | - |
Weakness: CWE-862 · 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
References
- Azure Event Grid Spoofing Vulnerability vendor-advisory, patch