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. The EPSS score of <1% indicates a very low likelihood that this vulnerability will be actively exploited in the wild, and it is not listed in CISA KEV, suggesting no known widespread active exploitation. 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 29, 2026 at 01:55 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 mitigates the Group Replication Plugin flaw by fixing the resource exhaustion vulnerability (CWE‑400) and enforcing limits on resource allocation (CWE‑770).
  • If a patch cannot be applied immediately, disable the Group Replication Plugin to eliminate the attack surface until the fix is available, thereby preventing the denial‑of‑service condition caused by uncontrolled resource usage (CWE‑400/CWE‑770).
  • Limit network exposure by restricting MySQL port access to trusted hosts, and monitor logs for abnormal crash activity to mitigate exploitation before patching, thereby reducing the potential for resource exhaustion (CWE‑400).

Generated by OpenCVE AI on April 29, 2026 at 01:55 UTC.

Tracking

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Advisories

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History

Thu, 23 Apr 2026 12:15:00 +0000

Type Values Removed Values Added
Title MySQL Server Denial of Service from Group Replication Plugin mysql: Group Replication Plugin unspecified vulnerability (CPU Apr 2026)
Weaknesses CWE-770
References
Metrics threat_severity

None

 threat_severity

Moderate

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 : Analyzed

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

Modified: 2026-04-23T15:05:56.567

Link: CVE-2026-34276

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-04-21T00:00:00Z

Links: CVE-2026-34276 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-04-29T02:00:27Z

Weaknesses