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DEBIAN-CVE-2026-59969

Type: advisorySource: OSV1 source record

Apache ZooKeeper quorum TLS fails to enforce peer hostname verification in FIPS-mode deployments. When sslQuorum=true, zookeeper.fips-mode=true, ssl.quorum.hostnameVerification=true, and ssl.quorum.clientHostnameVerification=true are enabled, the Java SSLSocket quorum path accepts a CA-trusted peer certificate whose SAN does not match the connected host. A malicious or misissued peer certificate can therefore join quorum traffic, participate in leader election, and enter replication flows. Users are recommended to upgrade to version 3.8.7 or 3.9.6, which fixes the issue.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-59969

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-2026-59969

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-2026-59969.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-2026-59969.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-2026-59969.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#58112 · Revision 1
Added to Heist Feed
Publisher date
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