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{"bugzilla": {"description": "mysql: Optimizer unspecified vulnerability (CPU Apr 2026)", "id": "2460340", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460340"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:H/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 8.0.0-8.0.45. Easily exploitable vulnerability allows high 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-2026-34267", "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-2026-34267\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-34267\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]"}}], "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": "2026-04-29T02:47:37.407744+00:00", "value": {"mitigation_remediation": ["Upgrade to a supported MySQL version that fixes the Optimizer flaw (e.g., 8.0.46 or later).", "Apply the Oracle security patch that specifically addresses the Optimizer vulnerability once it becomes available.", "Restrict network traffic to the MySQL port, limiting connections to trusted hosts to reduce exposure to high\u2011privileged attackers."], "summary": {"action": "Apply Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "Oracle MySQL Server versions 8.0.0 through 8.0.45 are affected. These releases are part of the mainstream Oracle MySQL distribution for enterprises.", "description_and_impact": "Oracle MySQL Server\u2019s Optimizer component contains a flaw that can be triggered by a high\u2011privileged attacker with network access. When exercised, the server either hangs or crashes, permanently disrupting database availability, which translates into a complete denial of service.", "risk_and_exploitability": "The CVSS base score of 4.9 indicates a moderate availability impact. The EPSS score of <1% indicates a very low but nonzero likelihood of exploitation, and the vulnerability is not listed in the CISA KEV catalog. The attack requires high privileged credentials and network access, and can be performed over multiple network protocols. If a functional exploit were discovered, it could repeatedly bring the database server offline until a patch is applied."}}}}, "created": "2026-04-22T02:00:04.892998+00:00", "updated": "2026-04-29T03:00:12.347668+00:00", "vendors": ["oracle", "oracle$PRODUCT$mysql_server"]}