CVE-2026-60178: MySQL Server Privilege Escalation Flaw

CVE-2026-60178 Overview

CVE-2026-60178 is a vulnerability in the Clone Plugin component of Oracle MySQL Server and MySQL Cluster. Oracle disclosed the issue in the July 2026 Critical Patch Update. The flaw allows a high-privileged attacker with network access via multiple protocols to compromise the affected database instance. Successful exploitation results in complete takeover of MySQL Server or MySQL Cluster, impacting confidentiality, integrity, and availability. The underlying weakness maps to [CWE-284] Improper Access Control. Exploitation is rated as difficult and requires authenticated privileged access to the database server.

Critical Impact
Successful exploitation permits full takeover of MySQL Server and MySQL Cluster instances, exposing all databases to unauthorized read, modification, and destruction.

Affected Products

Oracle MySQL Server versions 8.4.0 through 8.4.10 and 9.7.0 through 9.7.1
Oracle MySQL Cluster versions 8.0.0 through 8.0.47
Oracle MySQL Cluster versions 8.4.0 through 8.4.10 and 9.7.0 through 9.7.1

Discovery Timeline

2026-07-21 - CVE-2026-60178 published to the National Vulnerability Database
2026-07-23 - Last updated in NVD database

Technical Details for CVE-2026-60178

Vulnerability Analysis

The vulnerability resides in the MySQL Clone Plugin, which supports cloning of local or remote InnoDB data for use in replication and provisioning. Improper access control in the Clone Plugin allows a high-privileged authenticated user to bypass intended restrictions and take over the database service. Attackers can reach the vulnerable code path over the network using multiple MySQL protocols. Successful exploitation yields full control over the database instance, including data confidentiality, integrity, and availability. The Exploit Prediction Scoring System places this issue at the 28th percentile, indicating a low near-term probability of mass exploitation.

Root Cause

The root cause is improper access control within the Clone Plugin component ([CWE-284]). The plugin fails to consistently enforce authorization boundaries during clone operations, allowing privileged operations to be misused by an authenticated attacker.

Attack Vector

The attack vector is network-based but requires high privileges on the target MySQL instance and no user interaction. The high attack complexity reflects specific preconditions the attacker must satisfy to trigger the flaw. Multiple MySQL wire protocols expose the vulnerable Clone Plugin surface. Because no verified proof-of-concept code is available, exploitation details remain limited to Oracle's advisory. Review the Oracle Security Alert July 2026 for authoritative vendor guidance.

Detection Methods for CVE-2026-60178

Indicators of Compromise

Unexpected CLONE INSTANCE or CLONE LOCAL DATA statements executed by administrative accounts outside of planned maintenance windows.
New clone_status and clone_progress entries in performance_schema that do not correspond to authorized provisioning tasks.
Outbound MySQL connections from database hosts to unfamiliar donor or recipient endpoints.
Sudden creation of new privileged accounts or grant escalations following clone activity.

Detection Strategies

Audit MySQL general and error logs for Clone Plugin activity, focusing on BACKUP_ADMIN and CLONE_ADMIN privilege usage.
Alert on invocation of clone operations from accounts that historically do not perform provisioning tasks.
Correlate database privilege changes with clone events to identify chained abuse.

Monitoring Recommendations

Enable the MySQL Enterprise Audit plugin or equivalent to capture Clone Plugin statements with source IP and user context.
Forward MySQL audit logs to a centralized analytics platform for behavior baselining.
Monitor network flows to and from MySQL instances on ports used for clone donor connections.

How to Mitigate CVE-2026-60178

Immediate Actions Required

Apply the July 2026 Oracle Critical Patch Update to all affected MySQL Server and MySQL Cluster instances.
Inventory all MySQL deployments and confirm versions against the affected ranges before scheduling remediation.
Restrict BACKUP_ADMIN and CLONE_ADMIN privileges to a minimal set of operational accounts.
Rotate credentials for any account that held clone-related privileges prior to patching.

Patch Information

Oracle addressed CVE-2026-60178 in the Oracle Security Alert July 2026. Upgrade MySQL Server to a version later than 8.4.10 or 9.7.1 in the affected trains, and upgrade MySQL Cluster beyond 8.0.47, 8.4.10, or 9.7.1 as applicable. Verify patch application using SELECT VERSION(); after the upgrade.

Workarounds

Revoke BACKUP_ADMIN and CLONE_ADMIN privileges from non-essential accounts until patching is complete.
Disable the Clone Plugin with UNINSTALL PLUGIN clone; where clone functionality is not required.
Restrict network access to MySQL listeners using host firewalls and enforce TLS with client certificate authentication.
Isolate MySQL Cluster management and data nodes on dedicated network segments accessible only to authorized administrators.

bash

# Configuration example: disable Clone Plugin and restrict privileges
mysql -u root -p -e "UNINSTALL PLUGIN clone;"
mysql -u root -p -e "REVOKE BACKUP_ADMIN, CLONE_ADMIN ON *.* FROM 'app_user'@'%';"
mysql -u root -p -e "FLUSH PRIVILEGES;"