Vulnerability · Published Oct 20, 2026 · Assigned by oracle

CVE-2026-83404

High 7.5

In plain English

A high-severity missing authentication in MySQL Connectors from Oracle Corporation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.4%top 66.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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).

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Ubuntu:22.04:LTS	mysql-connector-python	no fix listed	UBUNTU-CVE-2026-83404
Ubuntu:24.04:LTS	mysql-connector-python	no fix listed	UBUNTU-CVE-2026-83404
Ubuntu:26.04:LTS	mysql-connector-python	no fix listed	UBUNTU-CVE-2026-83404
Ubuntu:26.10	mysql-connector-python	no fix listed	UBUNTU-CVE-2026-83404

Affected products (as reported)

Vendor	Product	Versions
Oracle Corporation	MySQL Connectors	26.7.0

Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Oracle Advisory vendor-advisory