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DEBIAN-CVE-2026-79993

Type: advisorySource: OSV1 source record

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 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. This issue affects Apache ZooKeeper: from 3.9.0 through 3.9.5, from 3.8.0 through 3.8.6. Users are recommended to upgrade to version 3.9.6 or 3.8.7, which fixes the issue.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-79993

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-79993

zookeeper

Source reference: /affected/0/package/name

Affected versions
3.8.0-11

Source reference: /affected/0/versions

3.8.0-11+deb12u1

Source reference: /affected/0/versions

3.8.0-11+deb12u2

Source reference: /affected/0/versions

3.9.1-1

Source reference: /affected/0/versions

3.9.2-1

Source reference: /affected/0/versions

3.9.2-2

Source reference: /affected/0/versions

3.9.3-1

Source reference: /affected/0/versions

3.9.3-2

Source reference: /affected/0/versions

3.9.4-1

Source reference: /affected/0/versions

3.9.4-2

Source reference: /affected/0/versions

3.9.5-1

Source reference: /affected/0/versions

3.9.5-2

Source reference: /affected/0/versions

3.9.6-1

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

zookeeper

Source reference: /affected/1/package/name

Affected versions
3.9.3-1

Source reference: /affected/1/versions

3.9.3-1+deb13u1

Source reference: /affected/1/versions

3.9.3-2

Source reference: /affected/1/versions

3.9.4-1

Source reference: /affected/1/versions

3.9.4-2

Source reference: /affected/1/versions

3.9.5-1

Source reference: /affected/1/versions

3.9.5-2

Source reference: /affected/1/versions

3.9.6-1

Source reference: /affected/1/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

zookeeper

Source reference: /affected/2/package/name

Affected versions
3.9.3-1

Source reference: /affected/2/versions

3.9.3-2

Source reference: /affected/2/versions

3.9.4-1

Source reference: /affected/2/versions

3.9.4-2

Source reference: /affected/2/versions

3.9.5-1

Source reference: /affected/2/versions

3.9.5-2

Source reference: /affected/2/versions

Fixed versions
3.9.6-1

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "zookeeper",
      "purl": "pkg:deb/debian/zookeeper?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "3.8.0-11",
      "3.8.0-11+deb12u1",
      "3.8.0-11+deb12u2",
      "3.9.1-1",
      "3.9.2-1",
      "3.9.2-2",
      "3.9.3-1",
      "3.9.3-2",
      "3.9.4-1",
      "3.9.4-2",
      "3.9.5-1",
      "3.9.5-2",
      "3.9.6-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-79993.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "zookeeper",
      "purl": "pkg:deb/debian/zookeeper?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "3.9.3-1",
      "3.9.3-1+deb13u1",
      "3.9.3-2",
      "3.9.4-1",
      "3.9.4-2",
      "3.9.5-1",
      "3.9.5-2",
      "3.9.6-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-79993.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.9.6-1"
          }
        ]
      }
    ],
    "package": {
      "name": "zookeeper",
      "purl": "pkg:deb/debian/zookeeper?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.9.3-1",
      "3.9.3-2",
      "3.9.4-1",
      "3.9.4-2",
      "3.9.5-1",
      "3.9.5-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-79993.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#58206 · Revision 1
Added to Heist Feed
Publisher date
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