VDB
DEBIAN-CVE-2026-24281
DEBIAN-CVE-2026-24281
PUBLISHED
CVSS 7.400000095367432 HIGH
Hostname verification in Apache ZooKeeper ZKTrustManager falls back to reverse DNS (PTR) when IP SAN validation fails, allowing attackers who control or spoof PTR records to impersonate ZooKeeper servers or clients with a valid certificate for the PTR name. It's important to note that attacker must present a certificate which is trusted by ZKTrustManager which makes the attack vector harder to exploit. Users are recommended to upgrade to version 3.8.6 or 3.9.5, which fixes this issue by introducing a new configuration option to disable reverse DNS lookup in client and quorum protocols.
Risk Scores
CVSS 3.1
7.400000095367432
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | zookeeper | 3.8.0-11, 3.9.3-2, 3.9.5-1 |
| Debian:11 | zookeeper | 3.8.0-1, 3.9.2-2, 0 |
| Debian:14 | zookeeper | 3.9.4-2, 3.9.4-1, 3.9.3-1 |
| Debian:13 | zookeeper | 3.9.3-1, 3.9.3-2, 3.9.4-1 |
Exploit Intelligence
- dependency-suppression.xml (github-poc)
- pom.xml (github-poc)
Timeline
- Mar 7, 2026 CVE Published
- Apr 28, 2026 CVE Updated