Description
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Group Replication Plugin). Supported versions that are affected are 8.0.0-8.0.45, 8.4.0-8.4.8 and 9.0.0-9.6.0. Easily exploitable vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Published: 2026-04-21
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service on MySQL Server
Action: Immediate Patch
AI Analysis

Impact

The vulnerability resides in the Group Replication Plugin of Oracle MySQL Server. It permits a low‑privileged attacker with network access through supported protocols to cause the server to enter a hang or repeatedly crash, abruptly terminating services. No confidential data is disclosed or altered; the effect is limited to availability loss.

Affected Systems

Affected products are Oracle Corporation MySQL Server versions 8.0.0 through 8.0.45, 8.4.0 through 8.4.8, and 9.0.0 through 9.6.0. The issue is confined to the server component that implements Group Replication.

Risk and Exploitability

The CVSS 3.1 base score of 6.5 indicates moderate severity focused on availability. EPSS information is lacking, and the vulnerability is not listed in CISA KEV, implying a lower but still realistic threat level. An attacker only needs network reach to the MySQL port and does not require elevated privileges, making exploitation relatively straightforward. Successful exploitation results in a denial‑of‑service condition affecting all clients connected to the compromised instance.

Generated by OpenCVE AI on April 22, 2026 at 05:07 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the latest Oracle MySQL Server patch or upgrade to a version newer than 8.0.45, 8.4.8, or 9.6.0. The official Oracle update addresses the Group Replication Plugin flaw.
  • If a patch cannot be applied immediately, disable the Group Replication Plugin to eliminate the attack surface until a fix is available.
  • Limit network exposure by restricting MySQL port access to trusted hosts, and monitor logs for abnormal crash activity, to mitigate exploitation before patching.

Generated by OpenCVE AI on April 22, 2026 at 05:07 UTC.

Tracking

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Advisories

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History

Wed, 22 Apr 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 22 Apr 2026 05:30:00 +0000

Type Values Removed Values Added
Title MySQL Server Denial of Service from Group Replication Plugin
Weaknesses CWE-400

Wed, 22 Apr 2026 00:00:00 +0000

Type Values Removed Values Added
Description Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Group Replication Plugin). Supported versions that are affected are 8.0.0-8.0.45, 8.4.0-8.4.8 and 9.0.0-9.6.0. Easily exploitable vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
First Time appeared Oracle
Oracle mysql Server
CPEs cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle mysql Server
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

Subscriptions

Oracle Mysql Server
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-04-22T14:49:36.952Z

Reserved: 2026-03-26T19:48:45.675Z

Link: CVE-2026-34276

cve-icon Vulnrichment

Updated: 2026-04-22T14:48:41.618Z

cve-icon NVD

Status : Received

Published: 2026-04-21T21:16:31.693

Modified: 2026-04-22T15:16:14.983

Link: CVE-2026-34276

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-22T05:15:06Z

Weaknesses