{"id":"CVE-2026-101789","title":"mysql: mysql: Denial of Service via the Optimizer component (CVE-2026-101789)","summary":"A flaw was found in the MySQL Optimizer component. An authenticated remote attacker with low privileges can exploit this vulnerability over the network to cause a Denial of Service (DoS). Successful exploitation allows the attacker to hang…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-400","vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","affected":["enterprise_linux 10","enterprise_linux 9"],"published":"2026-10-20","updated":"2026-10-22","sourceUpdated":"2026-10-22T22:20:09+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101789.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101789.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-101789"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2557265"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-101789"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101789"},{"url":"https://www.oracle.com/security-alerts/cpuoct2026.html"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00353,"epssPercentile":0.28744,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-22T17:02:26.761746Z"},"ingestedAt":"2026-10-20T22:23:33.920Z","slug":"CVE-2026-101789","body":"## Overview\n\nA flaw was found in the MySQL Optimizer component. An authenticated remote attacker with low privileges can exploit this vulnerability over the network to cause a Denial of Service (DoS). Successful exploitation allows the attacker to hang or repeatedly crash the server, disrupting database operations for legitimate users.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · updated 2026-10-22 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101789.json)\n\n**mysql: mysql: Denial of Service via the Optimizer component** — rated Moderate by Red Hat. Released 2026-10-20, updated 2026-10-22.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Hardened Images\n\n## Remediation\n\nAffected","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}