How severe is CVE-2026-83404?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Oracle Corporation MySQL Connectors

CVE-2026-83404

Vulnerability in the MySQL Connectors product of Oracle MySQL (component: Connector/Python). The supported version that is affected is 26.7.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Connectors. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all MySQL Connectors accessible data. CVSS 3.1 Base Score 7.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Published 2026-10-20 · last modified 2026-10-21.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Oracle Corporation MySQL Connectors — versions 26.7.0

References

www.oracle.com/security-alerts/cpuoct2026.html (vendor-advisory)

Frequently asked questions

What is CVE-2026-83404?: CVE-2026-83404 is a high-severity vulnerability in Oracle Corporation MySQL Connectors. CVSS score: 7.5/10. Published 2026-10-20.
How severe is CVE-2026-83404?: High severity. CVSS v3 base score is 7.5 out of 10.