CVE-2026-24281

high Apache
CVSS v3 Base Score
7.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS Score
0.6%
Exploitation probability in 30 days
Top 55% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
None
Published: March 7, 2026 (125 days ago)
Last Modified: July 3, 2026
Vendor: Apache
Source: NVD

Description

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.

CWE

CWE-295

Affected Products

apache zookeeper

References

🔗 lists.apache.org 🔗 www.openwall.com 🔗 access.redhat.com 🔗 access.redhat.com 🔗 access.redhat.com