{"id":"CVE-2026-79993","title":"The `deleteContainer` opcode (0x14/20) is processed without verifying the caller's ACL permissions, allowing any authenticated client to delete specific znodes in the data tree regardless of the ACL restrictions on the znode or its paren…","summary":"The `deleteContainer` opcode (0x14/20) is processed without verifying the caller's ACL permissions, allowing any authenticated client to delete specific znodes in the data tree regardless of the ACL restrictions on the znode or its paren…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-862","CWE-425"],"vendor":"apache","product":"zookeeper","affected":["zookeeper >= 3.8.0, < 3.8.7","zookeeper >= 3.9.0, < 3.9.6"],"patched":["zookeeper 3.9.6"],"published":"2026-09-16","updated":"2026-09-18","sourceUpdated":"2026-09-18T14:37:21.703","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-79993","references":[{"url":"https://lists.apache.org/thread/9cw3rmrzhqpct26v8j18fy41bghlq8y5","label":"security@apache.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/09/15/5","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-79993.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-79993"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2535095"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-79993"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-79993"},{"url":"https://access.redhat.com/errata/RHSA-2026:83612"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00603,"epssPercentile":0.48634,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-17T19:15:43.099911Z"},"ingestedAt":"2026-09-16T09:53:11.604Z","scores":{"nvd":7.5,"vendor":9.1},"slug":"CVE-2026-79993","body":"## Overview\n\nThe `deleteContainer` opcode (0x14/20) is processed without verifying the caller's ACL permissions, allowing any authenticated client to delete specific znodes in the data tree regardless of the ACL restrictions on the znode or its parent. This opcode is considered internal-only and the official client doesn't have API for it, but a client that can open a plain TCP session on the ZooKeeper client port (2181 by default) - with NO authentication and NO ACL permissions - can delete any empty persistent znode (including regular persistent nodes, container nodes, and TTL nodes) by issuing the raw protocol OpCode deleteContainer (20). The deleteContainer request path completely skips both the session check and the DELETE ACL check that are enforced by the regular delete (OpCode 2) path. This is an authorization bypass / ACL enforcement bug.\n\nThis issue affects Apache ZooKeeper: from 3.9.0 through 3.9.5, from 3.8.0 through 3.8.6.\n\nUsers are recommended to upgrade to version 3.9.6 or 3.8.7, which fixes the issue.\n\n## Affected\n\n- `zookeeper >= 3.8.0, < 3.8.7`\n- `zookeeper >= 3.9.0, < 3.9.6`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `zookeeper 3.9.6`\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat AMQ Broker 7, Red Hat build of Apache Camel for Spring Boot 4, Red Hat build of Debezium 3, Red Hat Data Grid 8, Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7, … · no fix planned: Red Hat Data Grid 8, Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7, Red Hat AMQ Broker 7, … · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-79993.json)\n- **RHSA-2026:83612** · Red Hat · fixed in: Red Hat Build of Debezium 3.6 · released 2026-10-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:83612)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":206521,"id":"CVE-2026-79993","ts":1789673253754,"field":"cvss","old":null,"new":"7.5"},{"seq":206520,"id":"CVE-2026-79993","ts":1789673253754,"field":"severity","old":"none","new":"high"}]}