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{"bugzilla": {"description": "mysql: Optimizer unspecified vulnerability (CPU Apr 2026)", "id": "2460334", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460334"}, "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: Optimizer). Supported versions that are affected are 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-2026-34272", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not 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": "Not affected", "package_name": "mysql:8.0/mysql", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "mysql:8.4/mysql", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "mysql", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not 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-2026-34272\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-34272\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": "[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": "2026-04-22T05:09:00.248957+00:00", "value": {"mitigation_remediation": ["Upgrade Oracle MySQL Server to the latest release that includes the security fix for the Optimizer bug", "Restrict network access to the MySQL service by configuring firewall rules to allow only trusted IPs, thereby reducing the attack surface for low\u2011privileged attackers", "Continuously monitor MySQL logs and system metrics for signs of repeated crashes or abnormal query traffic, and implement automated alerts or scheduled restarts to maintain availability"], "summary": {"action": "Immediate Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "Oracle Corporation\u2019s MySQL Server versions 9.0.0 through 9.6.0 are affected. These versions are commonly deployed in web and application environments that rely on MySQL for backend storage.", "description_and_impact": "The vulnerability exists in the Optimizer component of Oracle MySQL Server. A low privileged attacker with network access can trigger a crash or hang in the server, leading to a complete denial of service. The primary impact is loss of availability; confidentiality and integrity are not directly affected.", "risk_and_exploitability": "The CVSS 3.1 base score of 6.5 indicates moderate severity, with the availability dimension rated high while confidentiality and integrity remain unaffected. The EPSS score is not available, and the vulnerability is not yet listed in the CISA KEV catalog, suggesting no confirmed widespread exploitation yet. However, the attack vector is network based, requires low privileges, and thus the risk of successful exploitation remains significant for exposed MySQL instances."}}}}, "created": "2026-04-22T03:15:06.283093+00:00", "title": "MySQL Server Optimizer Component Denial of Service via Low-Privilege Network Exploit", "updated": "2026-04-22T05:15:06.069833+00:00", "vendors": ["oracle", "oracle$PRODUCT$mysql_server"], "weaknesses": ["CWE-400", "CWE-399"]}