# CVE-2026-46863: Oracle MySQL denial of service in Connection Handling

Source: https://junglewise.ai/threats/cve-2026-46863-oracle-mysql-denial-of-service-in-connection-handling  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-17. Updated: 2026-06-17  
License: CC BY 4.0 with a link back

CVE-2026-46863 · Severity: high · CVSS 7.5 · Published 2026-06-17

A vulnerability in Oracle MySQL Server and MySQL Cluster could allow an attacker to remotely crash the database service. This component is responsible for managing incoming connections to the database. If exploited, the database may become unresponsive or shut down completely, leading to a total loss of service for applications and users relying on the data.

Technologies: [Oracle MySQL Server](https://junglewise.ai/threats/technologies/mysql-server), [Oracle Mysql Cluster](https://junglewise.ai/threats/technologies/mysql-cluster). Vendors: [Oracle](https://junglewise.ai/threats/vendors/oracle).

## Quick answers

**Is CVE-2026-46863 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-46863 being exploited in the wild.

**How severe is CVE-2026-46863?** High severity, with a CVSS score of 7.5, published 17 June 2026.

**Which products and versions are affected?** Oracle MySQL Server 8.4.0-8.4.9, 9.0.0-9.7.0; Oracle Mysql Cluster 8.0.11-8.0.46, 8.4.0-8.4.9, 9.0.0-9.7.0.

**Is there a fix for CVE-2026-46863?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-46863 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-46863?** Check whether you run Oracle MySQL Server or Oracle Mysql Cluster at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A vulnerability exists in the 'Server: Connection Handling' component of Oracle MySQL Server and MySQL Cluster. The flaw is classified as uncontrolled resource consumption (CWE-400), which allows an unauthenticated attacker with network access via multiple protocols to trigger a denial-of-service (DoS) condition. Successful exploitation can result in a complete hang or a frequently repeatable crash of the affected database instance. The vulnerability is considered easily exploitable as it requires no special privileges or user interaction. Affected versions include MySQL Server 8.4.x and 9.x, and MySQL Cluster 8.0.x, 8.4.x, and 9.x.

## Affected products

- Oracle MySQL Server 8.4.0-8.4.9, 9.0.0-9.7.0
- Oracle MySQL Cluster 8.0.11-8.0.46, 8.4.0-8.4.9, 9.0.0-9.7.0

## Timeline

- 2026-06-17: disclosed: Initial disclosure by Oracle
- 2026-06-17: advisory: NVD publication date

## References

- [https://www.oracle.com/security-alerts/cspujun2026.html](https://www.oracle.com/security-alerts/cspujun2026.html)

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