CVE-2026-101761: Medium severity Oracle MySQL Server vulnerability
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Security: Encryption). 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. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 5.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H).
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/mysql-9.7to a version that resolves this vulnerability.Fixed in 9.7.4-2
Event History
Frequently Asked Questions
Who can exploit this issue?
An unauthenticated attacker with network access to a vulnerable MySQL Server or MySQL Cluster instance can attempt exploitation. No user interaction or existing database privileges are required, but exploitation is rated difficult.
What is the expected impact of a successful attack?
A successful attack can cause the affected MySQL Server or MySQL Cluster service to hang or crash repeatedly, resulting in a complete denial of service. The provided CVSS information indicates no confidentiality or integrity impact.
Which deployments should be prioritized for remediation?
Prioritize instances reachable over the network, especially those running MySQL Server 8.4.0 through 8.4.12, 9.7.0 through 9.7.3, or 26.7.0 through 26.7.1, and the listed MySQL Cluster versions. Because network access is sufficient and authentication is not required, externally reachable or broadly accessible database services have the greatest exposure.
How can I determine whether an environment is affected?
Identify whether the deployment is MySQL Server or MySQL Cluster and compare its installed version with the affected ranges. MySQL Cluster is affected in versions 8.0.0 through 8.0.49, 8.4.0 through 8.4.12, 9.7.0 through 9.7.3, and 26.7.0 through 26.7.1.