Quick answers
- Is CVE-2026-101799 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-101799 being exploited in the wild.
- How severe is CVE-2026-101799?
- 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-2026-101799?
- 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-2026-101799 attacked?
- It is attacked from the adjacent network, in a software library.
- Am I affected by CVE-2026-101799?
- 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
An easily exploitable denial-of-service vulnerability in the Group Replication GCS component of MySQL Server and MySQL Cluster requires only adjacent network access (same physical communication segment) and no authentication. Successful exploitation results in a hang or crash of the affected database instance. The vulnerability was assigned CVSS score 6.5 with vector AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, indicating high availability impact but no confidentiality or integrity risk.
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