CVE-2026-101773 Oracle MySQL Server & MySQL Cluster - Broken Access Control

Oracle MySQL Server and MySQL Cluster (8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1, and 8.0.0-8.0.49 for Cluster) contain an integrity and availability vulnerability in the Group Replication Plugin, letting unauthenticated attackers with physical communication segment access cause denial of service or unauthorized data modification.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

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

Vendor fix

Update to the latest MySQL Server and MySQL Cluster versions beyond the affected ranges.

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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