{"schema_version":"1.9.0","id":"CVE-2026-21948","published":"2026-01-20T21:56:29.010Z","modified":"2026-08-12T03:51:38.762413379Z","related":["ALSA-2026:4162","ALSA-2026:4828","ALSA-2026:5580","ALSA-2026:5640","ALSA-2026:6391"],"details":"Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer).  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).","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mysql/mysql-server","events":[{"introduced":"270fd3411e3d671a73ed9725940a30080f59ce6d"},{"last_affected":"153abc27b7dda30b455c0d99e657dac4e39e3505"},{"introduced":"dc86e412f18b36ce271f791026714e8caa0ec919"},{"last_affected":"aa461240270d809bcac336483b886b3d1789d4d9"},{"introduced":"527c12ed611f3fe072c3043734319edb2c733099"},{"last_affected":"056a391cdc1af9b17b5415aee243483d1bac532d"}],"database_specific":{"cpe":"cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"8.0.0"},{"last_affected":"8.0.44"},{"introduced":"8.4.0"},{"last_affected":"8.4.7"},{"introduced":"9.0.0"},{"last_affected":"9.5.0"}],"source":"CPE_RANGE"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21948.json"}}],"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21948.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21948"},{"type":"ADVISORY","url":"https://www.oracle.com/security-alerts/cpujan2026.html"}],"database_specific":{"cna_assigner":"oracle","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21948.json","unresolved_ranges":[{"extracted_events":[{"introduced":"8.0.0"},{"last_affected":"8.0.44"},{"introduced":"8.4.0"},{"last_affected":"8.4.7"},{"introduced":"9.0.0"},{"last_affected":"9.5.0"}],"source":"AFFECTED_FIELD"},{"extracted_events":[{"introduced":"8.0.0"},{"last_affected":"8.0.44"},{"introduced":"8.4.0"},{"last_affected":"8.4.7"},{"introduced":"9.0.0"},{"last_affected":"9.5.0"}],"source":"CPE_FIELD"}]},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"}]}