DEBIAN-CVE-2026-59969
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.
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/versions3.8.0-11+deb12u1Source reference:
/affected/0/versions3.8.0-11+deb12u2Source reference:
/affected/0/versions3.9.1-1Source reference:
/affected/0/versions3.9.2-1Source reference:
/affected/0/versions3.9.2-2Source reference:
/affected/0/versions3.9.3-1Source reference:
/affected/0/versions3.9.3-2Source reference:
/affected/0/versions3.9.4-1Source reference:
/affected/0/versions3.9.4-2Source reference:
/affected/0/versions3.9.5-1Source reference:
/affected/0/versions3.9.5-2Source reference:
/affected/0/versions3.9.6-1Source 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/versions3.9.3-1+deb13u1Source reference:
/affected/1/versions3.9.3-2Source reference:
/affected/1/versions3.9.4-1Source reference:
/affected/1/versions3.9.4-2Source reference:
/affected/1/versions3.9.5-1Source reference:
/affected/1/versions3.9.5-2Source reference:
/affected/1/versions3.9.6-1Source 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/versions3.9.3-2Source reference:
/affected/2/versions3.9.4-1Source reference:
/affected/2/versions3.9.4-2Source reference:
/affected/2/versions3.9.5-1Source reference:
/affected/2/versions3.9.5-2Source 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