Severity by source
AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
Network access required but high complexity and high privileges constrain exploitation; impact is availability-only with no confidentiality or integrity effect.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
Lifecycle Timeline
2DescriptionCVE.org
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Replication). Supported versions that are affected are MySQL Server: 8.4.0-8.4.10, 9.7.0-9.7.1; MySQL Cluster: 8.0.0-8.0.47, 8.4.0-8.4.10 and 9.7.0-9.7.1. Difficult to exploit vulnerability allows high 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 4.4 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H).
AnalysisAI
Denial of service in Oracle MySQL Server and MySQL Cluster's replication component allows a high-privileged network attacker to cause a complete hang or repeatedly crash the database server. Affected deployments span MySQL Server 8.4.0-8.4.10 and 9.7.0-9.7.1, as well as MySQL Cluster 8.0.0-8.0.47, 8.4.0-8.4.10, and 9.7.0-9.7.1. No public exploit code and no confirmed active exploitation have been identified; the high privilege and high complexity requirements substantially constrain real-world risk to insider threats or compromised DBA-level accounts.
Technical ContextAI
The vulnerability resides in the Server: Replication component of Oracle MySQL, which manages primary-to-replica data streaming and change propagation across nodes. In MySQL Cluster (NDB), this extends to a distributed, shared-nothing architecture where replication channels coordinate across multiple data nodes. The affected CPE strings - cpe:2.3:a:oracle_corporation:mysql_server and cpe:2.3:a:oracle_corporation:mysql_cluster - span multiple active version branches (8.0.x, 8.4.x, and 9.7.x), indicating the flaw is present across a wide range of release lines. Oracle has not assigned a CWE, preventing definitive root-cause classification, but the availability-only impact (A:H with C:N/I:N) and the DoS outcome (hang or frequent crash) are consistent with assertion failures, resource exhaustion, or improper input validation within the replication protocol handler.
RemediationAI
Patch via the Oracle Critical Patch Update for July 2026 at https://www.oracle.com/security-alerts/cpujul2026.html; exact patched version numbers for each affected branch (8.0.x, 8.4.x, 9.7.x) must be confirmed from the CPU patch matrix, as they are not explicitly stated in the available advisory reference. As a compensating control prior to patching, restrict network access to MySQL replication ports (default TCP 3306 and cluster-specific ports) to only trusted, explicitly authorized hosts using host-based firewall rules or MySQL's bind-address configuration - note this may disrupt legitimate replication topologies if not scoped carefully. Additionally, audit and revoke high-privilege MySQL grants such as REPLICATION SLAVE, SYSTEM_USER, and SUPER from any accounts that do not strictly require them, reducing the privilege surface an attacker would need to exploit this flaw.
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View allVendor StatusVendor
SUSE
Severity: Moderate| Product | Status |
|---|---|
| SUSE Liberty Linux 10 | Fixed |
| SUSE Liberty Linux 8 | Fixed |
| SUSE Liberty Linux 9 | Fixed |
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-46594
GHSA-cpr6-wv9j-3qvg