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{"bugzilla": {"description": "mysql: Group Replication Plugin unspecified vulnerability (CPU Apr 2026)", "id": "2460356", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460356"}, "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-770", "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-2026-34276", "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-2026-34276\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-34276\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": "2026-04-29T01:55:40.102974+00:00", "value": {"mitigation_remediation": ["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\u2011400) and enforcing limits on resource allocation (CWE\u2011770).", "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\u2011of\u2011service condition caused by uncontrolled resource usage (CWE\u2011400/CWE\u2011770).", "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\u2011400)."], "summary": {"action": "Immediate Patch", "impact": "Denial of Service on MySQL Server"}, "threat_synthesis": {"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.", "description_and_impact": "The vulnerability resides in the Group Replication Plugin of Oracle MySQL Server. It permits a low\u2011privileged 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.", "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\u2011of\u2011service condition affecting all clients connected to the compromised instance."}}}}, "created": "2026-04-22T02:00:04.890271+00:00", "updated": "2026-04-29T02:00:27.263567+00:00", "vendors": ["oracle", "oracle$PRODUCT$mysql_server"]}