{"identifier":"CVE-2026-34278","cve":{"id":"CVE-2026-34278","description":"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. 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).","published":"2026-04-21T21:16:32.027000+00:00","modified":"2026-10-26T22:10:00.163000+00:00","status":"Analyzed","score":4.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","cvss_version":"3.1","affected":[{"criteria":"cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*","versionStartIncluding":"8.0.0","versionStartExcluding":"","versionEndIncluding":"8.0.45","versionEndExcluding":""}],"weaknesses":["CWE-400"],"references":[{"url":"https://www.oracle.com/security-alerts/cpuapr2026.html","source":"secalert_us@oracle.com","tags":["Vendor Advisory"]}],"kev":null,"kev_checked":true,"metrics":{"cvssMetricV31":[{"source":"secalert_us@oracle.com","type":"Secondary","cvssData":{"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","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.2,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-04-22T14:46:53.082335Z","id":"CVE-2026-34278","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*","versionStartIncluding":"8.0.0","versionEndIncluding":"8.0.45","matchCriteriaId":"523E15F1-A21A-4D5D-82D5-2EB73B972AD9"}]}]}],"source":"nvd","retrieved_at":"2026-10-28T10:19:25.522532+00:00","exploited":false,"kev_stale":false,"products":["oracle / mysql server"],"priority":{"label":"Assess exposure and vendor guidance","reasons":["No higher-priority signal is available in the current stored evidence."]},"epss":{"probability":0.00323,"percentile":0.25171,"date":"2026-10-27","stale":false},"version_assessment":null},"news":[],"campaigns":[],"domains":[{"domain":"www.oracle.com","source_url":"https://www.oracle.com/security-alerts/cpuapr2026.html","investigate_url":"https://investigate.aeglixmind.com/#www.oracle.com"}],"arsenal_url":"https://arsenal.aeglixmind.com/?cve=CVE-2026-34278","catalog_url":"https://cves.aeglixmind.com/cve/CVE-2026-34278","research_url":"https://investigate.aeglixmind.com/research/cve/CVE-2026-34278","coverage":{"news_candidates_checked":0,"campaign_candidates_checked":0,"bounded":false,"notice":"Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence."}}