Oracle MySQL Connector/J: Vulnerability allowing takeover via HTTP
Summary
A vulnerability in Oracle MySQL Connectors, component Connector/J, affects version 26.7.0 according to the CVE record. An unauthenticated attacker with network access via HTTP may be able to take over the connector, with high impact on confidentiality, integrity and availability. The attack is rated difficult to exploit (AC:H), and the realistic exposure is internet-facing Java applications that bundle the driver rather than the MySQL server itself.
Affected
- Oracle MySQL Connectors, component Connector/J, version 26.7.0 (per CVE record)
- Possibly 26.7.1 (listed in Oracle's October 2026 CPU advisory excerpt; not yet confirmed)
- Status of older 9.x branches: Unknown.
Fixed in
- Connector/J 26.10.0 (GA release dated 2026-10-21, per vendor release notes; linkage to this CVE is secondary and should be confirmed in Oracle's advisory)
Workaround
- None documented in the sources reviewed.
- If an upgrade is delayed, restrict which hosts can reach the application and its HTTP interface.
Exploitation
- CISA KEV listing: Unknown; check the catalogue directly.
- Confirmed in-the-wild exploitation: none found in the sources reviewed.
- Public proof of concept: none found.
- EPSS: about 0.4% (low).
- CISA SSVC: Exploitation none, Automatable no, Technical Impact total.
Our recommendation
- Inventory where Connector/J is bundled, including Maven, Gradle and WAR files and third-party software.
- Prioritise internet-facing Java applications that use the driver.
- Upgrade to Connector/J 26.10.0 or a fixed version confirmed in Oracle's October 2026 CPU advisory.
- Note that Connector/J 26.7 documents support for MySQL 8.4 and later only; check MySQL 8.0 deployments.
- Monitor HTTP access to affected applications until patched.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Oracle Security Alert Advisory - October 2026 CPU www.oracle.com
- Connector/J release notes (PDF) downloads.mysql.com
- Connector/J release notes dev.mysql.com
- OpenMetadata pull request 36205 (secondary link to CVE) github.com
- Strix CVE record CVE-2026-101768 www.strix.ai
- Tenable: Oracle October 2026 CPU www.tenable.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 18:23.
Original description (NVD)
Vulnerability in the MySQL Connectors product of Oracle MySQL (component: Connector/J). The supported version that is affected is 26.7.0. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise MySQL Connectors. Successful attacks of this vulnerability can result in takeover of MySQL Connectors. CVSS 3.1 Base Score 8.1 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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