Is CVE-2026-101778 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-101778 being exploited in the wild.

How severe is CVE-2026-101778?

Medium severity, with a CVSS score of 6.5, published 20 October 2026.

Which products and versions are affected?

Oracle MySQL Server 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1; Oracle Mysql Cluster 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1.

Is there a fix for CVE-2026-101778?

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-2026-101778 attacked?

It is attacked over the network.

Am I affected by CVE-2026-101778?

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.

CVE-2026-101778: Oracle MySQL Server denial of service in Components Services

CVE-2026-101778 · Severity: medium · CVSS 6.5 · Published 2026-10-20

A vulnerability in Oracle MySQL Server and MySQL Cluster allows a low-privileged attacker with network access to cause the database to crash or hang, disrupting service availability. An attacker with minimal database privileges can repeatedly trigger the denial-of-service condition, making the system unavailable to legitimate users and applications that depend on the database.

Technologies: Oracle MySQL Server, Oracle Mysql Cluster. Vendors: Oracle.

Quick answers

Is CVE-2026-101778 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-101778 being exploited in the wild.
How severe is CVE-2026-101778?: Medium severity, with a CVSS score of 6.5, published 20 October 2026.
Which products and versions are affected?: Oracle MySQL Server 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1; Oracle Mysql Cluster 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1.
Is there a fix for CVE-2026-101778?: 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-2026-101778 attacked?: It is attacked over the network.
Am I affected by CVE-2026-101778?: 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 denial-of-service vulnerability exists in the Server: Components Services component of MySQL Server and MySQL Cluster. The vulnerability is exploitable over the network by a low-privileged (authenticated) attacker without user interaction, resulting in a hang or complete crash of the database service. A fix exists in patched versions of the affected products.

Affected products

Oracle MySQL Server 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1
Oracle MySQL Cluster 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1

Timeline

2026-10-20: disclosed

References

https://www.oracle.com/security-alerts/cpuoct2026.html

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