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{"bugzilla": {"description": "mysql: Group Replication Plugin unspecified vulnerability (CPU Apr 2026)", "id": "2460276", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460276"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["Oracle CPU describes the issue as following: 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."], "name": "CVE-2026-34271", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "mysql8.4", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "mysql", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "mysql:8.0/mysql", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "mysql:8.4/mysql", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "mysql", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "mysql:8.4/mysql", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-34271\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-34271\nhttps://www.oracle.com/security-alerts/cpuapr2026.html\nhttps://www.oracle.com/security-alerts/cpuapr2026.html#AppendixMSQL"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Oracle MySQL Critical Patch Update.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.0.0,8.0.45]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.4.0,8.4.8]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.0.0,9.6.0]"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "MySQL Server", "source": "cna", "vendor": "Oracle Corporation"}, "product": "mysql_server", "vendor": "oracle"}], "analysis": {"en": {"generated_at": "2026-04-28T21:26:17.538117+00:00", "value": {"mitigation_remediation": ["Apply the patch or upgrade to the latest MySQL Server release that includes the fix released by Oracle.", "If the Group Replication Plugin is not required, remove or disable it to eliminate the attack surface.", "Restrict inbound traffic to MySQL ports using firewall rules, allowing only trusted hosts to communicate with the server.", "Monitor server logs for repeated crash events to identify potential exploitation attempts."], "summary": {"action": "Patch Now", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "Oracle 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 are affected.", "description_and_impact": "A vulnerability in the Group Replication Plugin of Oracle MySQL Server allows a low\u2011privileged attacker with network access through multiple protocols to trigger a hang or recurrent crash of the MySQL Server. An attacker can exploit this flaw to cause a complete denial of service without needing elevated system privileges.", "risk_and_exploitability": "The CVSS 3.1 base score of 6.5 indicates a moderate severity focused on availability. Attack complexity is low, and the requirement is only network access to the MySQL service. The EPSS score of 0.04% and the absence of the vulnerability from CISA\u2019s KEV catalog suggest that publicly available exploits are uncommon. Nonetheless, the potential for recurring service interruption warrants timely remediation."}}}}, "created": "2026-04-22T03:15:06.283367+00:00", "title": "MySQL Server Group Replication Denial\u2011of\u2011Service Vulnerability", "updated": "2026-04-28T21:30:26.129014+00:00", "vendors": ["oracle", "oracle$PRODUCT$mysql_server"], "weaknesses": ["CWE-400", "CWE-772"]}