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VulnerabilityPublished Updated

CVE-2024-23944: Apache ZooKeeper · Information disclosure in persistent watcher handling

Affects zookeeperSource GCVE Database

0

Not known to be exploited : upgrade to 3.9.2 or 3.8.4 when convenient.

Data as of 26 Oct 2026, 17:16 UTC

Severity
Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS
0.2% chance of exploitation in 30 days – higher than 15% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 3.9.2, 3.8.4

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 31 Mar 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade zookeeper to 3.9.2 or 3.8.4.

Affected software

ProductAffectedFixed in
Bitnamizookeeperpkg:bitnami/zookeeperOther threatsAffected
  • >=3.6.0 <3.8.4
  • >=3.9.0 <3.9.2
Fixed in
  • 3.8.4
  • 3.9.2

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Users should upgrade Apache ZooKeeper to version 3.8.4 or 3.9.2 or later, where this vulnerability is fixed. Applying these official fixes fully mitigates the issue.

Description

Apache ZooKeeper versions 3.6.0 through before 3.8.4 and 3.9.0 through before 3.9.2 contain an information disclosure vulnerability in the handling of persistent watchers. The issue arises from a missing ACL check when a persistent watcher is triggered, allowing an attacker with access to a parent znode to monitor child znodes and see their full paths. Although the znode data is not exposed, the path information can contain sensitive details such as usernames or login IDs. Upgrading to versions 3.8.4 or 3.9.2 resolves this vulnerability.

References

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