CVE-2026-101802: Medium severity Oracle MySQL Server vulnerability
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Parser). 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 low privileged 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 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/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 - Upgrade
Upgrade
ubuntu/mysql-8.0to a version that resolves this vulnerability.Fixed in 8.0.46-0ubuntu0.22.04.5 - Upgrade
Upgrade
ubuntu/mysql-8.0to a version that resolves this vulnerability.Fixed in 8.0.46-0ubuntu0.24.04.5 - Upgrade
Upgrade
ubuntu/mysql-9.7to a version that resolves this vulnerability.Fixed in 9.7.4-0ubuntu0.26.10.1 - Upgrade
Upgrade
ubuntu/mysql-8.4to a version that resolves this vulnerability.Fixed in 8.4.13-0ubuntu0.26.04.2
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An attacker needs network access to the affected MySQL Server or MySQL Cluster instance and low-level privileges. No user interaction is required, and the issue is described as easily exploitable.
What is the practical 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 affected instances that accept network connections from low-privileged users, especially where service availability is important. The affected ranges include MySQL Server 8.4.0 through 8.4.12, 9.7.0 through 9.7.3, and 26.7.0 through 26.7.1; MySQL Cluster is also affected in 8.0.0 through 8.0.49 and those same later ranges.