`CVE-2024-23944` Apache ZooKeeper

Affected software	Apache ZooKeeper
Severity	5.3 Medium CVSS 3.1
Fixed in	`3.8.4`, `3.9.2`
Weakness	Missing authorization (CWE-862)
Published	15 Mar 2024
Updated	17 Jun 2026

Description

Information disclosure in persistent watchers handling in Apache ZooKeeper due to missing ACL check. It allows an attacker to monitor child znodes by attaching a persistent watcher (addWatch command) to a parent which the attacker has already access to. ZooKeeper server doesn't do ACL check when the persistent watcher is triggered and as a consequence, the full path of znodes that a watch event gets triggered upon is exposed to the owner of the watcher. It's important to note that only the path is exposed by this vulnerability, not the data of znode, but since znode path can contain sensitive information like user name or login ID, this issue is potentially critical. Users are recommended to upgrade to version 3.9.2, 3.8.4 which fixes the issue.

CWE-200 · Information exposure

Exploitation status

No public exploit

No exploit has been reported in the sources we check. Published 2 years ago.

CISA KEV not listed
VulnCheck KEV not listed
CISA Vulnrichment exploitation: none
Indexed PoC none indexed
EPSS 0.25% chance in 30 days

Waratek protection

No exploit published

Within Waratek scope. In the sources we check, nobody has published exploit code for this CVE or reported it being exploited.

A public code fix exists: apache/zookeeper 29c7b94.

Protection none
Action unverified
Review automated Upstream data
Record active

Decided by	Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all
Finding	This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious.

Decided by

Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all

Finding

This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious.

Affected software and releases

Oracle advisories

Advisory	Type	Quarter	Products Oracle names in its risk matrix
Oracle Critical Patch Update April 2026 ↗	CPU	2026-Q2	Oracle E-Business Suite / ECC Core (Netty) (15.0)
Oracle Critical Patch Update October 2024 ↗	CPU	2024-Q4	Oracle GoldenGate / Spark (Apache ZooKeeper) (19.1.0.0.0-19.1.0.0.9)
Oracle Critical Patch Update July 2024 ↗	CPU	2024-Q3	Oracle Construction and Engineering / Document Management (Apache ZooKeeper) (19.12.0-19.12.16, 20.12.0-20.12.16, 21.12.0-21.12.17, 22.12.0-22.12.13, 23.12.0-23.12.6)

Advisory

Type

Quarter

Products Oracle names in its risk matrix

Oracle Critical Patch Update April 2026 ↗

CPU

2026-Q2

Oracle E-Business Suite / ECC Core (Netty) (15.0)

Oracle Critical Patch Update October 2024 ↗

CPU

2024-Q4

Oracle GoldenGate / Spark (Apache ZooKeeper) (19.1.0.0.0-19.1.0.0.9)

Oracle Critical Patch Update July 2024 ↗

CPU

2024-Q3

Oracle Construction and Engineering / Document Management (Apache ZooKeeper) (19.12.0-19.12.16, 20.12.0-20.12.16, 21.12.0-21.12.17, 22.12.0-22.12.13, 23.12.0-23.12.6)

Oracle components and versions

Family	Component	Versions, as Oracle lists them	Read as
Oracle Construction and Engineering	Document Management (Apache ZooKeeper)	19.12.0-19.12.16, 20.12.0-20.12.16, 21.12.0-21.12.17, 22.12.0-22.12.13, 23.12.0-23.12.6
Oracle E-Business Suite	ECC Core (Netty)	15.0	15.0
Oracle GoldenGate	Spark (Apache ZooKeeper)	19.1.0.0.0-19.1.0.0.9

Maven packages

Affected and fixed versions, from OSV.dev

Package Introduced Fixed Last affected

org.apache.zookeeper:zookeeper 3.8.0 3.8.4 unbounded

org.apache.zookeeper:zookeeper 3.9.0 3.9.2 unbounded

org.apache.zookeeper:zookeeper 3.6.0 none 3.7.2

Package	Introduced	Fixed	Last affected
`org.apache.zookeeper:zookeeper`	3.8.0	`3.8.4`	unbounded
`org.apache.zookeeper:zookeeper`	3.9.0	`3.9.2`	unbounded
`org.apache.zookeeper:zookeeper`	3.6.0	none	3.7.2

Products and versions

2 products, 6 version entries

Source	Vendor	Product	Scheme	Affected versions
nvd	apache	zookeeper	generic	≥ 3.6.0 and ≤ 3.7.2 · ≥ 3.8.0 and ＜ 3.8.4 · ≥ 3.9.0 and ＜ 3.9.2
osv	org.apache.zookeeper	zookeeper	generic	≥ 3.6.0 and ≤ 3.7.2 · ≥ 3.8.0 and ＜ 3.8.4 · ≥ 3.9.0 and ＜ 3.9.2

Source

Vendor

Product

Scheme

Affected versions

nvd

apache

zookeeper

generic

≥ 3.6.0 and ≤ 3.7.2 · ≥ 3.8.0 and ＜ 3.8.4 · ≥ 3.9.0 and ＜ 3.9.2

osv

org.apache.zookeeper

zookeeper

generic

≥ 3.6.0 and ≤ 3.7.2 · ≥ 3.8.0 and ＜ 3.8.4 · ≥ 3.9.0 and ＜ 3.9.2

References

URL	Tags
https://github.com/apache/zookeeper/commit/29c7b9462681f47c2ac12e609341cf9f52abac5c	WEB
https://github.com/apache/zookeeper/commit/65b91d2d9a56157285c2a86b106e67c26520b01d	WEB
https://github.com/apache/zookeeper/commit/daf7cfd04005cff1a4f7cab5ab13d41db88d0cd8	WEB
https://github.com/apache/zookeeper	PACKAGE
https://lists.apache.org/thread/96s5nqssj03rznz9hv58txdb2k1lr79k	WEB
http://www.openwall.com/lists/oss-security/2024/03/14/2	WEB

URL

Timeline

Published	2024-03-15	By the CVE Program.
NVD record modified	2026-06-17	NVD's own last-modified date for this record.

Published

2024-03-15

By the CVE Program.

NVD record modified

2026-06-17

NVD's own last-modified date for this record.

How VRT decided (17 of 24 rules ran)

17 of 24 rules ran. The rest didn't run because an earlier rule had already settled the CVE.

# Rule Outcome Status Detail

identity: Does this identifier describe a vulnerability at all? the first rule that matches decides

1 rejected no match CVE Program withdrawal of this identifier

scope: Is it a vulnerability Waratek protects? the first rule that matches decides

2 armr-patch-file no match An ARMR patch file on disk for this CVE

3 armr-secure-rule-file no match An ARMR security-rule template on disk for this CVE

4 manual-classification no match A researcher's recorded decision for this specific CVE

5 manual classification no match Manual classification of this CVE in the legacy dataset

6 non-java-upstream no match A root cause in non-Java code: an OS kernel, a C library, or a bundled runtime

7 oracle-component no match The defect being in a component of a tracked product the agent does not reach: JavaFX, the Java SE installer, the JInitiator browser plug-in, the native WebLogic proxy plug-in, or a native part of Oracle Application Server or Collaboration Suite (HTTP Server, Web Cache, Internet Directory, mail and calendar servers). Oracle gives these no CPE of their own and names them only in the description.

8 java-client-side no match Oracle's own risk-matrix note saying the CVE is reached only through untrusted code in the Java sandbox (applets, Web Start) or only through a client installation of Java, so a server running its own trusted code is not exposed

9 osv-maven matched In scope Maven packages: org.apache.zookeeper:zookeeper

10 cna-maven-package not reached An affected Maven artifact named by the CNA itself

11 known-cpe-product not reached An NVD CPE naming a product ARMR tracks

12 cna-cpe-product not reached A CPE the CNA published naming a tracked product. Oracle publishes these on advisory day, months before NVD.

13 oracle-advisory-family not reached A tracked product family named in Oracle's own risk matrix. CPE cannot carry a suite name, only a module.

14 cna-named-product not reached A tracked product named in words by the CVE's own CNA, on a record with no CPE yet. Apache and Eclipse publish these on advisory day, before NVD adds CPE data.

15 non-deployable-product not reached The only affected product being a sealed appliance image, where Java runs but no -javaagent can be attached

16 unmatched-product not reached No tracked product matched above, and none present at all

disposition: What do we do about one that is? every rule runs

17 patch-hint no match A reference pointing at the upstream fix: a commit, a PR, a Red Hat bug

18 open-source-maven matched Mitigation candidate Open-source Maven artifact indexed by OSV (Maven packages: org.apache.zookeeper:zookeeper). The source is public, which makes an ARMR patch rule a candidate; nothing here establishes that one can be written.

19 poc-derivable skipped An indexed exploit clearing the evidence bar to reverse-engineer, where there is no source to read

20 no-exploit skipped Nothing to build a rule from yet: no published exploit, no CISA record of exploitation and no source-level change to read

21 secure-rule-match no match A vulnerability class already blocked by an ARMR security rule

22 exploited-no-fix-or-poc skipped Somebody exploiting this CVE (a CISA or VulnCheck KEV listing, or a CISA verdict of active exploitation), with no fix, source code or PoC to build a rule from

23 below-action-threshold withheld CVE ships in Oracle Critical Patch Update April 2026, Oracle Critical Patch Update October 2024, Oracle Critical Patch Update July 2024 (CPU) — Oracle treats it as urgent, so severity does not settle it

24 no-exploit-published decided it matched No exploit published No exploit code has been published, and an upstream fix path does exist, so the remediation half of the candidacy still holds.

Products the scope rules checked

The products this CVE's record names, and whether VRT tracks each one. The scope rules decided on these.

Vendor Product Tracked CPE Source

apache zookeeper tracked cpe:2.3:a:apache:zookeeper:*:*:*:*:*:*:*:* yaml

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