High severity · published Oct 20, 2026
CVE-2026-101781
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Group Replication GCS)
8.8
CVSS
0.3%
EPSS
No
On KEV
Description
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Group Replication GCS). Supported versions that are affected are MySQL Server: 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster: 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3 and 26.7.0-26.7.1. Easily exploitable vulnerability allows unauthenticated attacker with access to the physical communication segment attached to the hardware where the MySQL Server, MySQL Cluster executes to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in takeover of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MC
MySQL Cluster · Oracle Corporation
8.0.0-8.0.49; 8.4.0-8.4.12; 9.7.0-9.7.3; 26.7.0-26.7.1 · source: vendor
MS
MySQL Server · Oracle Corporation
8.4.0-8.4.12; 9.7.0-9.7.3; 26.7.0-26.7.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-101781
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-101781
www.oracle.com
https://www.oracle.com/security-alerts/cpuoct2026.html
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