{"affected":[{"defaultStatus":"unaffected","ecosystem":"maven","packageName":"org.apache.zookeeper:zookeeper","product":"Apache ZooKeeper","source":"CNA: apache","vendor":"Apache Software Foundation","versions":[{"lessThanOrEqual":"3.9.6","status":"affected","version":"3.9.0","versionType":"maven"},{"lessThanOrEqual":"3.8.7","status":"affected","version":"3.8.0","versionType":"maven"}]}],"cveId":"CVE-2026-100300","cwes":["CWE-755"],"description":"Improper handling of exceptional conditions in the quota subsystem of Apache ZooKeeper allows an attacker able to write under the /zookeeper/quota subtree — unauthenticated on default deployments, where that subtree is world-writable — to crash the server's critical request-processing thread and render the on-disk data directory permanently unbootable.\n\nThis issue affects Apache ZooKeeper up to and including 3.9.6. Users are recommended to upgrade to version 3.8.8 or 3.9.7, which fixes the issue.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":8.7,"severity":"high","source":"CNA: apache","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":8.7,"severity":"high","source":"NVD: security@apache.org","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"}],"modifiedAt":1793809050950,"publishedAt":1793789114858,"references":[{"source":"CNA: apache","tags":["vendor-advisory"],"url":"https://lists.apache.org/thread.html/09pgg7rcpzz44noxgtvpzstwt8fmvsb0"},{"source":"ADP: CVE","tags":[],"url":"http://www.openwall.com/lists/oss-security/2026/11/03/11"},{"source":"security@apache.org","tags":[],"url":"https://lists.apache.org/thread.html/09pgg7rcpzz44noxgtvpzstwt8fmvsb0"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"url":"http://www.openwall.com/lists/oss-security/2026/11/03/11"}],"remediation":[],"revision":"38a79cb8d7f7c3ebac6de8eeeae72947dbdce4f41f8ca96bb074692e1fa83a8e","sources":[{"modifiedAt":1793805535306,"name":"CNA: apache","retrievedAt":1793808502465,"url":"https://www.cve.org/CVERecord?id=CVE-2026-100300"},{"modifiedAt":1793809050950,"name":"NVD","retrievedAt":1793816691153,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100300"}],"ssvc":{"assessedAt":1793802955242,"automatable":"yes","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Apache ZooKeeper: Unauthenticated persistent denial of service via unvalidated quota-node data and paths crashing the transaction-apply thread","updatedAt":1793816691153}