{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-21937", "assignerOrgId": "43595867-4340-4103-b7a2-9a5208d29a85", "state": "PUBLISHED", "assignerShortName": "oracle", "dateReserved": "2026-01-05T18:07:34.710Z", "datePublished": "2026-01-20T21:56:25.387Z", "dateUpdated": "2026-01-21T20:58:32.805Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "43595867-4340-4103-b7a2-9a5208d29a85", "shortName": "oracle", "dateUpdated": "2026-01-20T21:56:25.387Z"}, "problemTypes": [{"descriptions": [{"lang": "en-US", "description": "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."}]}], "affected": [{"vendor": "Oracle Corporation", "product": "MySQL Server", "versions": [{"version": "8.0.0", "status": "affected", "lessThanOrEqual": "8.0.44", "versionType": "custom"}, {"version": "8.4.0", "status": "affected", "lessThanOrEqual": "8.4.7", "versionType": "custom"}, {"version": "9.0.0", "status": "affected", "lessThanOrEqual": "9.5.0", "versionType": "custom"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*", "versionStartIncluding": "8.0.0", "versionEndIncluding": "8.0.44"}, {"vulnerable": true, "criteria": "cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*", "versionStartIncluding": "8.4.0", "versionEndIncluding": "8.4.7"}, {"vulnerable": true, "criteria": "cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*", "versionStartIncluding": "9.0.0", "versionEndIncluding": "9.5.0"}]}]}], "descriptions": [{"lang": "en-US", "value": "Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DDL). Supported versions that are affected are 8.0.0-8.0.44, 8.4.0-8.4.7 and 9.0.0-9.5.0. 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. CVSS 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H)."}], "references": [{"url": "https://www.oracle.com/security-alerts/cpujan2026.html", "name": "Oracle Advisory", "tags": ["vendor-advisory"]}], "metrics": [{"cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "baseScore": 4.9, "baseSeverity": "MEDIUM"}}]}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "description": "CWE-noinfo Not enough information"}]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-01-21T20:58:18.776868Z", "id": "CVE-2026-21937", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-21T20:58:32.805Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-21937", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-21T20:58:18.776868Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "description": "CWE-noinfo Not enough information"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-21T20:58:28.973Z"}}], "cna": {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "Oracle Corporation", "product": "MySQL Server", "versions": [{"status": "affected", "version": "8.0.0", "versionType": "custom", "lessThanOrEqual": "8.0.44"}, {"status": "affected", "version": "8.4.0", "versionType": "custom", "lessThanOrEqual": "8.4.7"}, {"status": "affected", "version": "9.0.0", "versionType": "custom", "lessThanOrEqual": "9.5.0"}]}], "references": [{"url": "https://www.oracle.com/security-alerts/cpujan2026.html", "name": "Oracle Advisory", "tags": ["vendor-advisory"]}], "descriptions": [{"lang": "en-US", "value": "Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DDL). Supported versions that are affected are 8.0.0-8.0.44, 8.4.0-8.4.7 and 9.0.0-9.5.0. 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. CVSS 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H)."}], "problemTypes": [{"descriptions": [{"lang": "en-US", "description": "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."}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndIncluding": "8.0.44", "versionStartIncluding": "8.0.0"}, {"criteria": "cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndIncluding": "8.4.7", "versionStartIncluding": "8.4.0"}, {"criteria": "cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndIncluding": "9.5.0", "versionStartIncluding": "9.0.0"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "43595867-4340-4103-b7a2-9a5208d29a85", "shortName": "oracle", "dateUpdated": "2026-01-20T21:56:25.387Z"}}}, "cveMetadata": {"cveId": "CVE-2026-21937", "state": "PUBLISHED", "dateUpdated": "2026-01-21T20:58:32.805Z", "dateReserved": "2026-01-05T18:07:34.710Z", "assignerOrgId": "43595867-4340-4103-b7a2-9a5208d29a85", "datePublished": "2026-01-20T21:56:25.387Z", "assignerShortName": "oracle"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "C31CF81B-A295-4D90-84D3-377D7184D59D", "versionEndIncluding": "8.0.44", "versionStartIncluding": "8.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "19AAA920-1429-4F6F-A191-31632570991C", "versionEndIncluding": "8.4.7", "versionStartIncluding": "8.4.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "80A941A0-B16F-477B-9062-EF768F4CAAD4", "versionEndIncluding": "9.5.0", "versionStartIncluding": "9.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DDL). Supported versions that are affected are 8.0.0-8.0.44, 8.4.0-8.4.7 and 9.0.0-9.5.0. 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. CVSS 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H)."}], "id": "CVE-2026-21937", "lastModified": "2026-01-29T15:32:36.583", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 4.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 3.6, "source": "secalert_us@oracle.com", "type": "Primary"}]}, "published": "2026-01-20T22:15:56.410", "references": [{"source": "secalert_us@oracle.com", "tags": ["Vendor Advisory"], "url": "https://www.oracle.com/security-alerts/cpujan2026.html"}], "sourceIdentifier": "secalert_us@oracle.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "mysql: DDL unspecified vulnerability (CPU Jan 2026)", "id": "2431413", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2431413"}, "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"}, "details": ["Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DDL). Supported versions that are affected are 8.0.0-8.0.44, 8.4.0-8.4.7 and 9.0.0-9.5.0. 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. CVSS 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H)."], "name": "CVE-2026-21937", "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": "2026-01-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-21937\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-21937\nhttps://www.oracle.com/security-alerts/cpujan2026.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"}

{"analysis": {"en": {"generated_at": "2026-04-18T15:42:46.773334+00:00", "value": {"mitigation_remediation": ["Apply the January\u00a02026 MySQL Server security update published by Oracle, or upgrade to a later major release that is not in the affected version range.", "If a patch is not yet available, restrict MySQL Server to a trusted internal network, limit exposure of DDL\u2011capable endpoints, and enforce least\u2011privilege for users with schema\u2011altering rights.", "Continuously monitor MySQL Server logs for repeated crashes or hang attempts and investigate any anomalies to detect exploitation attempts early."], "summary": {"action": "Immediate Patch", "impact": "Denial of Service (Complete Crash)"}, "threat_synthesis": {"affected_systems": "Oracle Corporation\u2019s MySQL Server product is affected. The vulnerable ranges are 8.0.0\u20118.0.44, 8.4.0\u20118.4.7 and 9.0.0\u20119.5.0. Administrators should verify the exact build of Oracle MySQL Server they run and compare it to these ranges.", "description_and_impact": "A bug in the Data Definition Language handling of Oracle MySQL Server can be triggered by a high\u2011privileged attacker with network access, allowing the server to crash or become unresponsive. The vulnerability is a pure availability flaw with no direct impact on confidentiality or integrity, and it can be invoked by any protocol that can send DDL commands. The advertised severity is a CVSS 3.1 score of 4.9, reflecting a moderate exploitation risk for Availability. The attacker would gain the ability to cause an application hang or a repeatable crash, resulting in service disruption for all clients.", "risk_and_exploitability": "The exploit requires remote network connectivity and high\u2011privilege access to the MySQL Server, which limits the attack surface. The EPSS score of less than 1% indicates a very low probability of automatic exploitation in the wild, and the vulnerability is not listed in the CISA KEV catalog. Attackers would target the service via the usual SQL interfaces, using privileged accounts to send malformed DDL commands. Given the moderate CVSS score and low EPSS, the overall risk is moderate but the likelihood of exploitation remains low unless attackers or automated tools specifically target this flaw."}}}}, "created": "2026-04-18T15:45:04.275322+00:00", "updated": "2026-04-18T15:45:04.275333+00:00", "vendors": [], "weaknesses": ["CWE-119", "CWE-787"]}