Is CVE-2026-101803 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-101803 being exploited in the wild.

How severe is CVE-2026-101803?

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-2026-101803?

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-2026-101803 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-101803?

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-2026-101803: Oracle MySQL Server XML parsing privilege escalation

CVE-2026-101803 · Severity: medium · CVSS 6.5 · Published 2026-10-20

A vulnerability in Oracle MySQL Server's XML processing component allows high-privileged attackers on the network to corrupt or delete critical database data and cause the database to crash. This affects versions 8.4, 9.7, and 26.7 of MySQL Server and Cluster. An attacker with administrative credentials can exploit this to cause data loss or complete service outages.

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

Quick answers

Is CVE-2026-101803 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-101803 being exploited in the wild.
How severe is CVE-2026-101803?: 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-2026-101803?: 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-2026-101803 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-101803?: 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

The vulnerability exists in the MySQL Server XML parser component and is easily exploitable by high-privileged attackers with network access via multiple protocols. Successful exploitation can result in unauthorized data modification/deletion and denial of service through repeated crashes. A fix is expected in patched versions of the affected release lines.

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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