CVE-2026-101679 Oracle MySQL Server & MySQL Cluster - Denial of Service

Oracle MySQL Server and MySQL Cluster 8.4.0-8.4.12, 9.7.0-9.7.3, and 26.7.0-26.7.1 contain a denial of service caused by network-accessible vulnerability in client programs, letting unauthenticated attackers cause server hang or crash, exploit requires network access.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
20 October 2026
Updated
21 October 2026

Vendor fix

Update to the latest available version beyond 8.4.12, 9.7.3, or 26.7.1.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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