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28 vulnerabilities found for Apache ZooKeeper by Apache Software Foundation
CVE-2026-84501 (GCVE-0-2026-84501)
Vulnerability from nvd – Published: 2026-09-16 09:28 – Updated: 2026-09-16 19:43
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Operational log forgery via newline injection in EnsembleAuthenticationProvider
Summary
An unauthenticated attacker can inject arbitrary fake log lines into Apache ZooKeeper's operational log by sending a crafted add_auth("ensemble", ...) request containing newline characters (\n). When the ensemble name doesn't match, EnsembleAuthenticationProvider.handleAuthentication() logs the raw, unsanitized name via LOG.warn(). Because SLF4J's {} placeholder preserves embedded newlines, the attacker can forge complete log entries — with arbitrary timestamps, log levels, class names, and messages — that are visually indistinguishable from genuine ZooKeeper log output.
This issue affects Apache ZooKeeper: from 3.9.0 through 3.9.5, from 3.8.0 through 3.8.6.
Users are recommended to upgrade to version 3.8.7 or 3.9.6, which fixes the issue.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 19:42 UTC
CWE
- CWE-117 - Improper output neutralization for logs
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , ≤ 3.9.5
(maven)
Affected: 3.8.0 , ≤ 3.8.6 (maven) |
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CVE-2026-84439 (GCVE-0-2026-84439)
Vulnerability from nvd – Published: 2026-09-16 09:27 – Updated: 2026-09-17 19:14
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Audit log injection via unsanitized output from multiple sources
Summary
When audit logging is enabled (zookeeper.audit.enable=true), an unauthenticated attacker can inject arbitrary fields into Apache ZooKeeper's audit log by sending a digest authentication request with tab characters (\t) embedded in the username. Because the audit log uses tab-separated key=value format, the injected tabs are parsed as legitimate field separators, allowing the attacker to spoof audit results (e.g., injecting result=success), forge operation types, and corrupt forensic evidence.
A log injection vulnerability in Apache ZooKeeper allows a client that can call setACL to inject forged key-value fields into zookeeper_audit.log. When audit logging is enabled, the server serializes attacker-controlled digest ACL ids into the acl= audit field without escaping tab characters. Because audit events are emitted as tab-separated key=value records, a crafted ACL id can make one successful setAcl event appear to contain forged fields such as operation=delete and znode=/forged. This undermines the integrity of downstream audit parsing, alerting, and incident response.
This issue affects Apache ZooKeeper: from 3.9.0 through 3.9.5, from 3.8.0 through 3.8.6.
Users are recommended to upgrade to version 3.9.6 or 3.8.7, which fixes the issue.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 19:14 UTC
CWE
- CWE-117 - Improper output neutralization for logs
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , ≤ 3.9.5
(maven)
Affected: 3.8.0 , ≤ 3.8.6 (maven) |
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CVE-2026-79993 (GCVE-0-2026-79993)
Vulnerability from nvd – Published: 2026-09-16 09:27 – Updated: 2026-09-17 19:16
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Missing ACL check on deleteContainer opcode allows unauthorized deletion of any empty persistent/container znode
Summary
The `deleteContainer` opcode (0x14/20) is processed without verifying the caller's ACL permissions, allowing any authenticated client to delete specific znodes in the data tree regardless of the ACL restrictions on the znode or its parent. This opcode is considered internal-only and the official client doesn't have API for it, but a client that can open a plain TCP session on the ZooKeeper client port (2181 by default) - with NO authentication and NO ACL permissions - can delete any empty persistent znode (including regular persistent nodes, container nodes, and TTL nodes) by issuing the raw protocol OpCode deleteContainer (20). The deleteContainer request path completely skips both the session check and the DELETE ACL check that are enforced by the regular delete (OpCode 2) path. This is an authorization bypass / ACL enforcement bug.
This issue affects Apache ZooKeeper: from 3.9.0 through 3.9.5, from 3.8.0 through 3.8.6.
Users are recommended to upgrade to version 3.9.6 or 3.8.7, which fixes the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 19:15 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , ≤ 3.9.5
(maven)
Affected: 3.8.0 , ≤ 3.8.6 (maven) |
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CVE-2026-59969 (GCVE-0-2026-59969)
Vulnerability from nvd – Published: 2026-09-16 09:27 – Updated: 2026-09-17 19:17
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Improper validation of certificate with host mismatch in FIPS mode
Summary
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.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 19:16 UTC
CWE
- CWE-297 - Improper Validation of Certificate with Host Mismatch
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , ≤ 3.9.5
(maven)
Affected: 3.8.0 , ≤ 3.8.6 (maven) |
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CVE-2026-59739 (GCVE-0-2026-59739)
Vulnerability from nvd – Published: 2026-09-16 09:26 – Updated: 2026-09-17 19:19
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Information disclosure via SetWatches reconnect replay
Summary
Information disclosure via SetWatches reconnect replay in Apache ZooKeeper due to missing ACL check. An attacker can discover ACL-restricted paths by registering exists-watches on non-existent paths, then reconnecting after the paths are created with restricted ACLs. Issue is caused by incomplete fix for CVE-2024-23944 (ZOOKEEPER-4799). The fix added ACL checking to WatchManager.triggerWatch(). However, DataTree.setWatches() — the SetWatches/SetWatches2 reconnect replay handler — still calls watcher.process(event) with null ACL, bypassing the check entirely. 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 3.9.6, 3.8.7 which fixes the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 19:17 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/v0lrwsbdxvx6w67p3… | vendor-advisory |
Impacted products
1 product
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|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , ≤ 3.9.5
(maven)
Affected: 3.8.0 , ≤ 3.8.6 (semver) |
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CVE-2026-24308 (GCVE-0-2026-24308)
Vulnerability from nvd – Published: 2026-03-07 08:51 – Updated: 2026-07-15 02:46
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Sensitive information disclosure in client configuration handling
Summary
Improper handling of configuration values in ZKConfig in Apache ZooKeeper 3.8.5 and 3.9.4 on all platforms allows an attacker to expose sensitive information stored in client configuration in the client's logfile. Configuration values are exposed at INFO level logging rendering potential production systems affected by the issue. Users are recommended to upgrade to version 3.8.6 or 3.9.5 which fixes this issue.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-10 17:34 UTC
CWE
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/qng3rtzv2pqkmko4r… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/03/07/5 | |
| https://access.redhat.com/security/cve/CVE-2026-24308 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2445451 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:14276 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:14272 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:8509 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:10184 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:34608 | vendor-advisoryx_refsource_REDHAT |
Impacted products
17 products
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , ≤ 3.9.4
(maven)
Affected: 3.8.0 , ≤ 3.8.5 (maven) |
|
| Red Hat | Red Hat AMQ Broker 7.12.7 |
cpe:/a:redhat:amq_broker:7.12
|
|
| Red Hat | Red Hat AMQ Broker 7.13.5 |
cpe:/a:redhat:amq_broker:7.13
|
|
| Red Hat | Red Hat AMQ Broker 7.14.0 |
cpe:/a:redhat:amq_broker:7.14
|
|
| Red Hat | Streams for Apache Kafka 2.9.4 |
cpe:/a:redhat:amq_streams:2.9::el9
|
|
| Red Hat | Red Hat OpenShift AI 2.25 |
Unaffected:
1776756834 , < *
(rpm)
cpe:/a:redhat:openshift_ai:2.25::el9 |
|
| Red Hat | Red Hat build of Apache Camel for Spring Boot 4 |
cpe:/a:redhat:camel_spring_boot:4
|
|
| Red Hat | Red Hat build of Debezium 2 |
cpe:/a:redhat:debezium:2
|
|
| Red Hat | Red Hat build of Debezium 3 |
cpe:/a:redhat:debezium:3
|
|
| Red Hat | Red Hat Data Grid 8 |
cpe:/a:redhat:jboss_data_grid:8
|
|
| Red Hat | Red Hat Fuse 7 |
cpe:/a:redhat:jboss_fuse:7
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7 |
cpe:/a:redhat:jboss_enterprise_application_platform:7
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 |
cpe:/a:redhat:jboss_enterprise_application_platform:8
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack |
cpe:/a:redhat:jbosseapxp
|
|
| Red Hat | Red Hat Offline Knowledge Portal |
cpe:/a:redhat:offline_knowledge_portal:1
|
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai
|
|
| Red Hat | streams for Apache Kafka 3 |
cpe:/a:redhat:amq_streams:3
|
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CVE-2026-24281 (GCVE-0-2026-24281)
Vulnerability from nvd – Published: 2026-03-07 08:50 – Updated: 2026-07-15 01:17
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Reverse-DNS fallback enables hostname verification bypass in ZooKeeper ZKTrustManager
Summary
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.
Severity
5.9 (Medium)
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-10 17:36 UTC
CWE
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/088ddsbrzhd5lxzbq… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/03/07/4 | |
| https://access.redhat.com/security/cve/CVE-2026-24281 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2445449 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:14276 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:14272 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:8509 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:10184 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:34608 | vendor-advisoryx_refsource_REDHAT |
Impacted products
17 products
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , ≤ 3.9.4
(maven)
Affected: 3.8.0 , ≤ 3.8.5 (maven) |
|
| Red Hat | Red Hat AMQ Broker 7.12.7 |
cpe:/a:redhat:amq_broker:7.12
|
|
| Red Hat | Red Hat AMQ Broker 7.13.5 |
cpe:/a:redhat:amq_broker:7.13
|
|
| Red Hat | Red Hat AMQ Broker 7.14.0 |
cpe:/a:redhat:amq_broker:7.14
|
|
| Red Hat | Streams for Apache Kafka 2.9.4 |
cpe:/a:redhat:amq_streams:2.9::el9
|
|
| Red Hat | Red Hat OpenShift AI 2.25 |
Unaffected:
1776756834 , < *
(rpm)
cpe:/a:redhat:openshift_ai:2.25::el9 |
|
| Red Hat | Red Hat build of Apache Camel for Spring Boot 4 |
cpe:/a:redhat:camel_spring_boot:4
|
|
| Red Hat | Red Hat build of Debezium 2 |
cpe:/a:redhat:debezium:2
|
|
| Red Hat | Red Hat build of Debezium 3 |
cpe:/a:redhat:debezium:3
|
|
| Red Hat | Red Hat Data Grid 8 |
cpe:/a:redhat:jboss_data_grid:8
|
|
| Red Hat | Red Hat Fuse 7 |
cpe:/a:redhat:jboss_fuse:7
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7 |
cpe:/a:redhat:jboss_enterprise_application_platform:7
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 |
cpe:/a:redhat:jboss_enterprise_application_platform:8
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack |
cpe:/a:redhat:jbosseapxp
|
|
| Red Hat | Red Hat Offline Knowledge Portal |
cpe:/a:redhat:offline_knowledge_portal:1
|
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai
|
|
| Red Hat | streams for Apache Kafka 3 |
cpe:/a:redhat:amq_streams:3
|
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CVE-2025-58457 (GCVE-0-2025-58457)
Vulnerability from nvd – Published: 2025-09-24 09:29 – Updated: 2025-11-04 21:13
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Insufficient Permission Check in AdminServer Snapshot/Restore Commands
Summary
Improper permission check in ZooKeeper AdminServer lets authorized clients to run snapshot and restore command with insufficient permissions.
This issue affects Apache ZooKeeper: from 3.9.0 before 3.9.4.
Users are recommended to upgrade to version 3.9.4, which fixes the issue.
The issue can be mitigated by disabling both commands (via admin.snapshot.enabled and admin.restore.enabled), disabling the whole AdminServer interface (via admin.enableServer), or ensuring that the root ACL does not provide open permissions. (Note that ZooKeeper ACLs are not recursive, so this does not impact operations on child nodes besides notifications from recursive watches.)
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-09-24 13:47 UTC
CWE
- CWE-280 - Improper Handling of Insufficient Permissions or Privileges
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/r5yol0kkhx2fzw22p… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2025/0… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , < 3.9.4
(maven)
|
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CVE-2024-51504 (GCVE-0-2024-51504)
Vulnerability from nvd – Published: 2024-11-07 09:52 – Updated: 2024-11-07 16:33
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Authentication bypass with IP-based authentication in Admin Server
Summary
When using IPAuthenticationProvider in ZooKeeper Admin Server there is a possibility of Authentication Bypass by Spoofing -- this only impacts IP based authentication implemented in ZooKeeper Admin Server. Default configuration of client's IP address detection in IPAuthenticationProvider, which uses HTTP request headers, is weak and allows an attacker to bypass authentication via spoofing client's IP address in request headers. Default configuration honors X-Forwarded-For HTTP header to read client's IP address. X-Forwarded-For request header is mainly used by proxy servers to identify the client and can be easily spoofed by an attacker pretending that the request comes from a different IP address. Admin Server commands, such as snapshot and restore arbitrarily can be executed on successful exploitation which could potentially lead to information leakage or service availability issues. Users are recommended to upgrade to version 3.9.3, which fixes this issue.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-11-07 16:31 UTC
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
2 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
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(semver)
|
|
| apache | zookeeper |
Affected:
3.9.0 , < 3.9.3
(semver)
cpe:2.3:a:apache:zookeeper:-:*:*:*:*:*:*:* |
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CVE-2024-23944 (GCVE-0-2024-23944)
Vulnerability from nvd – Published: 2024-03-15 10:26 – Updated: 2025-07-03 14:52
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Information disclosure in persistent watcher handling
Summary
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.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-03-19 15:31 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/96s5nqssj03rznz9h… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2024/03/14/2 | x_transferred |
Impacted products
1 product
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|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , ≤ 3.9.1
(maven)
Affected: 3.8.0 , ≤ 3.8.3 (maven) Affected: 3.6.0 , ≤ 3.7.2 (maven) |
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CVE-2023-44981 (GCVE-0-2023-44981)
Vulnerability from nvd – Published: 2023-10-11 11:55 – Updated: 2025-04-23 16:15
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Authorization bypass in SASL Quorum Peer Authentication
Summary
Authorization Bypass Through User-Controlled Key vulnerability in Apache ZooKeeper. If SASL Quorum Peer authentication is enabled in ZooKeeper (quorum.auth.enableSasl=true), the authorization is done by verifying that the instance part in SASL authentication ID is listed in zoo.cfg server list. The instance part in SASL auth ID is optional and if it's missing, like 'eve@EXAMPLE.COM', the authorization check will be skipped. As a result an arbitrary endpoint could join the cluster and begin propagating counterfeit changes to the leader, essentially giving it complete read-write access to the data tree. Quorum Peer authentication is not enabled by default.
Users are recommended to upgrade to version 3.9.1, 3.8.3, 3.7.2, which fixes the issue.
Alternately ensure the ensemble election/quorum communication is protected by a firewall as this will mitigate the issue.
See the documentation for more details on correct cluster administration.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 13:27 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , < 3.9.1
(maven)
Affected: 3.8.0 , ≤ 3.8.2 (maven) Affected: 3.7.0 , ≤ 3.7.1 (maven) Affected: 0 , < 3.7.0 (maven) |
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CVE-2019-0201 (GCVE-0-2019-0201)
Vulnerability from nvd – Published: 2019-05-23 13:42 – Updated: 2024-08-04 17:44
VLAI
EPSS
VEX
Summary
An issue is present in Apache ZooKeeper 1.0.0 to 3.4.13 and 3.5.0-alpha to 3.5.4-beta. ZooKeeper’s getACL() command doesn’t check any permission when retrieves the ACLs of the requested node and returns all information contained in the ACL Id field as plaintext string. DigestAuthenticationProvider overloads the Id field with the hash value that is used for user authentication. As a consequence, if Digest Authentication is in use, the unsalted hash value will be disclosed by getACL() request for unauthenticated or unprivileged users.
Severity
No CVSS data available.
CWE
- Information Disclosure
Assigner
References
20 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
1.0.0 to 3.4.13
Affected: 3.5.0-alpha to 3.5.4-beta |
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CVE-2018-8012 (GCVE-0-2018-8012)
Vulnerability from nvd – Published: 2018-05-21 19:00 – Updated: 2024-09-17 00:01
VLAI
EPSS
VEX
Summary
No authentication/authorization is enforced when a server attempts to join a quorum in Apache ZooKeeper before 3.4.10, and 3.5.0-alpha through 3.5.3-beta. As a result an arbitrary end point could join the cluster and begin propagating counterfeit changes to the leader.
Severity
No CVSS data available.
CWE
- Gain Privilege
Assigner
References
12 references
| URL | Tags |
|---|---|
| https://www.debian.org/security/2018/dsa-4214 | vendor-advisoryx_refsource_DEBIAN |
| http://www.securitytracker.com/id/1040948 | vdb-entryx_refsource_SECTRACK |
| http://www.securityfocus.com/bid/104253 | vdb-entryx_refsource_BID |
| https://lists.apache.org/thread.html/053d9ce4d579… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/bcce5a9c532b… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/rca37935d661… | mailing-listx_refsource_MLIST |
| https://www.oracle.com/security-alerts/cpujul2020.html | x_refsource_MISC |
| https://lists.apache.org/thread.html/c75147028c1c… | x_refsource_MISC |
| https://lists.apache.org/thread.html/r8f0d920805a… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/rc5bc4ddb0de… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/r73daf1fc5d8… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/re3a4048e951… | mailing-listx_refsource_MLIST |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
Apache ZooKeeper prior to 3.4.10, Apache ZooKeeper 3.5.0-alpha through 3.5.3-beta
|
Date Public
2018-05-21 00:00
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CVE-2017-5637 (GCVE-0-2017-5637)
Vulnerability from nvd – Published: 2017-10-10 01:00 – Updated: 2024-09-17 00:16
VLAI
EPSS
VEX
Summary
Two four letter word commands "wchp/wchc" are CPU intensive and could cause spike of CPU utilization on Apache ZooKeeper server if abused, which leads to the server unable to serve legitimate client requests. Apache ZooKeeper thru version 3.4.9 and 3.5.2 suffer from this issue, fixed in 3.4.10, 3.5.3, and later.
Severity
No CVSS data available.
CWE
- DOS
Assigner
References
12 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread.html/58170aeb7a68… | mailing-listx_refsource_MLIST |
| http://www.securityfocus.com/bid/98814 | vdb-entryx_refsource_BID |
| https://access.redhat.com/errata/RHSA-2017:3355 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2017:3354 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2017:2477 | vendor-advisoryx_refsource_REDHAT |
| http://www.debian.org/security/2017/dsa-3871 | vendor-advisoryx_refsource_DEBIAN |
| https://lists.apache.org/thread.html/053d9ce4d579… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/bcce5a9c532b… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/rca37935d661… | mailing-listx_refsource_MLIST |
| https://www.oracle.com/security-alerts/cpujul2020.html | x_refsource_MISC |
| https://issues.apache.org/jira/browse/ZOOKEEPER-2693 | x_refsource_CONFIRM |
| https://www.oracle.com//security-alerts/cpujul2021.html | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.4.0 to 3.4.9
Affected: 3.5.0 to 3.5.2 |
Date Public
2017-10-09 00:00
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CVE-2026-84501 (GCVE-0-2026-84501)
Vulnerability from cvelistv5 – Published: 2026-09-16 09:28 – Updated: 2026-09-16 19:43
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Operational log forgery via newline injection in EnsembleAuthenticationProvider
Summary
An unauthenticated attacker can inject arbitrary fake log lines into Apache ZooKeeper's operational log by sending a crafted add_auth("ensemble", ...) request containing newline characters (\n). When the ensemble name doesn't match, EnsembleAuthenticationProvider.handleAuthentication() logs the raw, unsanitized name via LOG.warn(). Because SLF4J's {} placeholder preserves embedded newlines, the attacker can forge complete log entries — with arbitrary timestamps, log levels, class names, and messages — that are visually indistinguishable from genuine ZooKeeper log output.
This issue affects Apache ZooKeeper: from 3.9.0 through 3.9.5, from 3.8.0 through 3.8.6.
Users are recommended to upgrade to version 3.8.7 or 3.9.6, which fixes the issue.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 19:42 UTC
CWE
- CWE-117 - Improper output neutralization for logs
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , ≤ 3.9.5
(maven)
Affected: 3.8.0 , ≤ 3.8.6 (maven) |
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CVE-2026-84439 (GCVE-0-2026-84439)
Vulnerability from cvelistv5 – Published: 2026-09-16 09:27 – Updated: 2026-09-17 19:14
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Audit log injection via unsanitized output from multiple sources
Summary
When audit logging is enabled (zookeeper.audit.enable=true), an unauthenticated attacker can inject arbitrary fields into Apache ZooKeeper's audit log by sending a digest authentication request with tab characters (\t) embedded in the username. Because the audit log uses tab-separated key=value format, the injected tabs are parsed as legitimate field separators, allowing the attacker to spoof audit results (e.g., injecting result=success), forge operation types, and corrupt forensic evidence.
A log injection vulnerability in Apache ZooKeeper allows a client that can call setACL to inject forged key-value fields into zookeeper_audit.log. When audit logging is enabled, the server serializes attacker-controlled digest ACL ids into the acl= audit field without escaping tab characters. Because audit events are emitted as tab-separated key=value records, a crafted ACL id can make one successful setAcl event appear to contain forged fields such as operation=delete and znode=/forged. This undermines the integrity of downstream audit parsing, alerting, and incident response.
This issue affects Apache ZooKeeper: from 3.9.0 through 3.9.5, from 3.8.0 through 3.8.6.
Users are recommended to upgrade to version 3.9.6 or 3.8.7, which fixes the issue.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 19:14 UTC
CWE
- CWE-117 - Improper output neutralization for logs
Assigner
References
2 references
Impacted products
1 product
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|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , ≤ 3.9.5
(maven)
Affected: 3.8.0 , ≤ 3.8.6 (maven) |
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CVE-2026-79993 (GCVE-0-2026-79993)
Vulnerability from cvelistv5 – Published: 2026-09-16 09:27 – Updated: 2026-09-17 19:16
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Missing ACL check on deleteContainer opcode allows unauthorized deletion of any empty persistent/container znode
Summary
The `deleteContainer` opcode (0x14/20) is processed without verifying the caller's ACL permissions, allowing any authenticated client to delete specific znodes in the data tree regardless of the ACL restrictions on the znode or its parent. This opcode is considered internal-only and the official client doesn't have API for it, but a client that can open a plain TCP session on the ZooKeeper client port (2181 by default) - with NO authentication and NO ACL permissions - can delete any empty persistent znode (including regular persistent nodes, container nodes, and TTL nodes) by issuing the raw protocol OpCode deleteContainer (20). The deleteContainer request path completely skips both the session check and the DELETE ACL check that are enforced by the regular delete (OpCode 2) path. This is an authorization bypass / ACL enforcement bug.
This issue affects Apache ZooKeeper: from 3.9.0 through 3.9.5, from 3.8.0 through 3.8.6.
Users are recommended to upgrade to version 3.9.6 or 3.8.7, which fixes the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 19:15 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , ≤ 3.9.5
(maven)
Affected: 3.8.0 , ≤ 3.8.6 (maven) |
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CVE-2026-59969 (GCVE-0-2026-59969)
Vulnerability from cvelistv5 – Published: 2026-09-16 09:27 – Updated: 2026-09-17 19:17
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Improper validation of certificate with host mismatch in FIPS mode
Summary
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.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 19:16 UTC
CWE
- CWE-297 - Improper Validation of Certificate with Host Mismatch
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
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(maven)
Affected: 3.8.0 , ≤ 3.8.6 (maven) |
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CVE-2026-59739 (GCVE-0-2026-59739)
Vulnerability from cvelistv5 – Published: 2026-09-16 09:26 – Updated: 2026-09-17 19:19
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Information disclosure via SetWatches reconnect replay
Summary
Information disclosure via SetWatches reconnect replay in Apache ZooKeeper due to missing ACL check. An attacker can discover ACL-restricted paths by registering exists-watches on non-existent paths, then reconnecting after the paths are created with restricted ACLs. Issue is caused by incomplete fix for CVE-2024-23944 (ZOOKEEPER-4799). The fix added ACL checking to WatchManager.triggerWatch(). However, DataTree.setWatches() — the SetWatches/SetWatches2 reconnect replay handler — still calls watcher.process(event) with null ACL, bypassing the check entirely. 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 3.9.6, 3.8.7 which fixes the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 19:17 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/v0lrwsbdxvx6w67p3… | vendor-advisory |
Impacted products
1 product
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|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , ≤ 3.9.5
(maven)
Affected: 3.8.0 , ≤ 3.8.6 (semver) |
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CVE-2026-24308 (GCVE-0-2026-24308)
Vulnerability from cvelistv5 – Published: 2026-03-07 08:51 – Updated: 2026-07-15 02:46
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Sensitive information disclosure in client configuration handling
Summary
Improper handling of configuration values in ZKConfig in Apache ZooKeeper 3.8.5 and 3.9.4 on all platforms allows an attacker to expose sensitive information stored in client configuration in the client's logfile. Configuration values are exposed at INFO level logging rendering potential production systems affected by the issue. Users are recommended to upgrade to version 3.8.6 or 3.9.5 which fixes this issue.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-10 17:34 UTC
CWE
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/qng3rtzv2pqkmko4r… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/03/07/5 | |
| https://access.redhat.com/security/cve/CVE-2026-24308 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2445451 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:14276 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:14272 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:8509 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:10184 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:34608 | vendor-advisoryx_refsource_REDHAT |
Impacted products
17 products
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , ≤ 3.9.4
(maven)
Affected: 3.8.0 , ≤ 3.8.5 (maven) |
|
| Red Hat | Red Hat AMQ Broker 7.12.7 |
cpe:/a:redhat:amq_broker:7.12
|
|
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cpe:/a:redhat:amq_broker:7.13
|
|
| Red Hat | Red Hat AMQ Broker 7.14.0 |
cpe:/a:redhat:amq_broker:7.14
|
|
| Red Hat | Streams for Apache Kafka 2.9.4 |
cpe:/a:redhat:amq_streams:2.9::el9
|
|
| Red Hat | Red Hat OpenShift AI 2.25 |
Unaffected:
1776756834 , < *
(rpm)
cpe:/a:redhat:openshift_ai:2.25::el9 |
|
| Red Hat | Red Hat build of Apache Camel for Spring Boot 4 |
cpe:/a:redhat:camel_spring_boot:4
|
|
| Red Hat | Red Hat build of Debezium 2 |
cpe:/a:redhat:debezium:2
|
|
| Red Hat | Red Hat build of Debezium 3 |
cpe:/a:redhat:debezium:3
|
|
| Red Hat | Red Hat Data Grid 8 |
cpe:/a:redhat:jboss_data_grid:8
|
|
| Red Hat | Red Hat Fuse 7 |
cpe:/a:redhat:jboss_fuse:7
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7 |
cpe:/a:redhat:jboss_enterprise_application_platform:7
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 |
cpe:/a:redhat:jboss_enterprise_application_platform:8
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack |
cpe:/a:redhat:jbosseapxp
|
|
| Red Hat | Red Hat Offline Knowledge Portal |
cpe:/a:redhat:offline_knowledge_portal:1
|
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai
|
|
| Red Hat | streams for Apache Kafka 3 |
cpe:/a:redhat:amq_streams:3
|
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CVE-2026-24281 (GCVE-0-2026-24281)
Vulnerability from cvelistv5 – Published: 2026-03-07 08:50 – Updated: 2026-07-15 01:17
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Reverse-DNS fallback enables hostname verification bypass in ZooKeeper ZKTrustManager
Summary
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.
Severity
5.9 (Medium)
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-10 17:36 UTC
CWE
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/088ddsbrzhd5lxzbq… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/03/07/4 | |
| https://access.redhat.com/security/cve/CVE-2026-24281 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2445449 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:14276 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:14272 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:8509 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:10184 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:34608 | vendor-advisoryx_refsource_REDHAT |
Impacted products
17 products
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , ≤ 3.9.4
(maven)
Affected: 3.8.0 , ≤ 3.8.5 (maven) |
|
| Red Hat | Red Hat AMQ Broker 7.12.7 |
cpe:/a:redhat:amq_broker:7.12
|
|
| Red Hat | Red Hat AMQ Broker 7.13.5 |
cpe:/a:redhat:amq_broker:7.13
|
|
| Red Hat | Red Hat AMQ Broker 7.14.0 |
cpe:/a:redhat:amq_broker:7.14
|
|
| Red Hat | Streams for Apache Kafka 2.9.4 |
cpe:/a:redhat:amq_streams:2.9::el9
|
|
| Red Hat | Red Hat OpenShift AI 2.25 |
Unaffected:
1776756834 , < *
(rpm)
cpe:/a:redhat:openshift_ai:2.25::el9 |
|
| Red Hat | Red Hat build of Apache Camel for Spring Boot 4 |
cpe:/a:redhat:camel_spring_boot:4
|
|
| Red Hat | Red Hat build of Debezium 2 |
cpe:/a:redhat:debezium:2
|
|
| Red Hat | Red Hat build of Debezium 3 |
cpe:/a:redhat:debezium:3
|
|
| Red Hat | Red Hat Data Grid 8 |
cpe:/a:redhat:jboss_data_grid:8
|
|
| Red Hat | Red Hat Fuse 7 |
cpe:/a:redhat:jboss_fuse:7
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7 |
cpe:/a:redhat:jboss_enterprise_application_platform:7
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 |
cpe:/a:redhat:jboss_enterprise_application_platform:8
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack |
cpe:/a:redhat:jbosseapxp
|
|
| Red Hat | Red Hat Offline Knowledge Portal |
cpe:/a:redhat:offline_knowledge_portal:1
|
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai
|
|
| Red Hat | streams for Apache Kafka 3 |
cpe:/a:redhat:amq_streams:3
|
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CVE-2025-58457 (GCVE-0-2025-58457)
Vulnerability from cvelistv5 – Published: 2025-09-24 09:29 – Updated: 2025-11-04 21:13
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Insufficient Permission Check in AdminServer Snapshot/Restore Commands
Summary
Improper permission check in ZooKeeper AdminServer lets authorized clients to run snapshot and restore command with insufficient permissions.
This issue affects Apache ZooKeeper: from 3.9.0 before 3.9.4.
Users are recommended to upgrade to version 3.9.4, which fixes the issue.
The issue can be mitigated by disabling both commands (via admin.snapshot.enabled and admin.restore.enabled), disabling the whole AdminServer interface (via admin.enableServer), or ensuring that the root ACL does not provide open permissions. (Note that ZooKeeper ACLs are not recursive, so this does not impact operations on child nodes besides notifications from recursive watches.)
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-09-24 13:47 UTC
CWE
- CWE-280 - Improper Handling of Insufficient Permissions or Privileges
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/r5yol0kkhx2fzw22p… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2025/0… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , < 3.9.4
(maven)
|
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CVE-2024-51504 (GCVE-0-2024-51504)
Vulnerability from cvelistv5 – Published: 2024-11-07 09:52 – Updated: 2024-11-07 16:33
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Authentication bypass with IP-based authentication in Admin Server
Summary
When using IPAuthenticationProvider in ZooKeeper Admin Server there is a possibility of Authentication Bypass by Spoofing -- this only impacts IP based authentication implemented in ZooKeeper Admin Server. Default configuration of client's IP address detection in IPAuthenticationProvider, which uses HTTP request headers, is weak and allows an attacker to bypass authentication via spoofing client's IP address in request headers. Default configuration honors X-Forwarded-For HTTP header to read client's IP address. X-Forwarded-For request header is mainly used by proxy servers to identify the client and can be easily spoofed by an attacker pretending that the request comes from a different IP address. Admin Server commands, such as snapshot and restore arbitrarily can be executed on successful exploitation which could potentially lead to information leakage or service availability issues. Users are recommended to upgrade to version 3.9.3, which fixes this issue.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-11-07 16:31 UTC
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
2 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
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(semver)
|
|
| apache | zookeeper |
Affected:
3.9.0 , < 3.9.3
(semver)
cpe:2.3:a:apache:zookeeper:-:*:*:*:*:*:*:* |
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CVE-2024-23944 (GCVE-0-2024-23944)
Vulnerability from cvelistv5 – Published: 2024-03-15 10:26 – Updated: 2025-07-03 14:52
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Information disclosure in persistent watcher handling
Summary
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.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-03-19 15:31 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/96s5nqssj03rznz9h… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2024/03/14/2 | x_transferred |
Impacted products
1 product
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|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , ≤ 3.9.1
(maven)
Affected: 3.8.0 , ≤ 3.8.3 (maven) Affected: 3.6.0 , ≤ 3.7.2 (maven) |
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CVE-2023-44981 (GCVE-0-2023-44981)
Vulnerability from cvelistv5 – Published: 2023-10-11 11:55 – Updated: 2025-04-23 16:15
VLAI
EPSS
VEX
Title
Apache ZooKeeper: Authorization bypass in SASL Quorum Peer Authentication
Summary
Authorization Bypass Through User-Controlled Key vulnerability in Apache ZooKeeper. If SASL Quorum Peer authentication is enabled in ZooKeeper (quorum.auth.enableSasl=true), the authorization is done by verifying that the instance part in SASL authentication ID is listed in zoo.cfg server list. The instance part in SASL auth ID is optional and if it's missing, like 'eve@EXAMPLE.COM', the authorization check will be skipped. As a result an arbitrary endpoint could join the cluster and begin propagating counterfeit changes to the leader, essentially giving it complete read-write access to the data tree. Quorum Peer authentication is not enabled by default.
Users are recommended to upgrade to version 3.9.1, 3.8.3, 3.7.2, which fixes the issue.
Alternately ensure the ensemble election/quorum communication is protected by a firewall as this will mitigate the issue.
See the documentation for more details on correct cluster administration.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 13:27 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.9.0 , < 3.9.1
(maven)
Affected: 3.8.0 , ≤ 3.8.2 (maven) Affected: 3.7.0 , ≤ 3.7.1 (maven) Affected: 0 , < 3.7.0 (maven) |
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CVE-2019-0201 (GCVE-0-2019-0201)
Vulnerability from cvelistv5 – Published: 2019-05-23 13:42 – Updated: 2024-08-04 17:44
VLAI
EPSS
VEX
Summary
An issue is present in Apache ZooKeeper 1.0.0 to 3.4.13 and 3.5.0-alpha to 3.5.4-beta. ZooKeeper’s getACL() command doesn’t check any permission when retrieves the ACLs of the requested node and returns all information contained in the ACL Id field as plaintext string. DigestAuthenticationProvider overloads the Id field with the hash value that is used for user authentication. As a consequence, if Digest Authentication is in use, the unsalted hash value will be disclosed by getACL() request for unauthenticated or unprivileged users.
Severity
No CVSS data available.
CWE
- Information Disclosure
Assigner
References
20 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
1.0.0 to 3.4.13
Affected: 3.5.0-alpha to 3.5.4-beta |
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CVE-2018-8012 (GCVE-0-2018-8012)
Vulnerability from cvelistv5 – Published: 2018-05-21 19:00 – Updated: 2024-09-17 00:01
VLAI
EPSS
VEX
Summary
No authentication/authorization is enforced when a server attempts to join a quorum in Apache ZooKeeper before 3.4.10, and 3.5.0-alpha through 3.5.3-beta. As a result an arbitrary end point could join the cluster and begin propagating counterfeit changes to the leader.
Severity
No CVSS data available.
CWE
- Gain Privilege
Assigner
References
12 references
| URL | Tags |
|---|---|
| https://www.debian.org/security/2018/dsa-4214 | vendor-advisoryx_refsource_DEBIAN |
| http://www.securitytracker.com/id/1040948 | vdb-entryx_refsource_SECTRACK |
| http://www.securityfocus.com/bid/104253 | vdb-entryx_refsource_BID |
| https://lists.apache.org/thread.html/053d9ce4d579… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/bcce5a9c532b… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/rca37935d661… | mailing-listx_refsource_MLIST |
| https://www.oracle.com/security-alerts/cpujul2020.html | x_refsource_MISC |
| https://lists.apache.org/thread.html/c75147028c1c… | x_refsource_MISC |
| https://lists.apache.org/thread.html/r8f0d920805a… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/rc5bc4ddb0de… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/r73daf1fc5d8… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/re3a4048e951… | mailing-listx_refsource_MLIST |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
Apache ZooKeeper prior to 3.4.10, Apache ZooKeeper 3.5.0-alpha through 3.5.3-beta
|
Date Public
2018-05-21 00:00
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CVE-2017-5637 (GCVE-0-2017-5637)
Vulnerability from cvelistv5 – Published: 2017-10-10 01:00 – Updated: 2024-09-17 00:16
VLAI
EPSS
VEX
Summary
Two four letter word commands "wchp/wchc" are CPU intensive and could cause spike of CPU utilization on Apache ZooKeeper server if abused, which leads to the server unable to serve legitimate client requests. Apache ZooKeeper thru version 3.4.9 and 3.5.2 suffer from this issue, fixed in 3.4.10, 3.5.3, and later.
Severity
No CVSS data available.
CWE
- DOS
Assigner
References
12 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread.html/58170aeb7a68… | mailing-listx_refsource_MLIST |
| http://www.securityfocus.com/bid/98814 | vdb-entryx_refsource_BID |
| https://access.redhat.com/errata/RHSA-2017:3355 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2017:3354 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2017:2477 | vendor-advisoryx_refsource_REDHAT |
| http://www.debian.org/security/2017/dsa-3871 | vendor-advisoryx_refsource_DEBIAN |
| https://lists.apache.org/thread.html/053d9ce4d579… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/bcce5a9c532b… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/rca37935d661… | mailing-listx_refsource_MLIST |
| https://www.oracle.com/security-alerts/cpujul2020.html | x_refsource_MISC |
| https://issues.apache.org/jira/browse/ZOOKEEPER-2693 | x_refsource_CONFIRM |
| https://www.oracle.com//security-alerts/cpujul2021.html | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache ZooKeeper |
Affected:
3.4.0 to 3.4.9
Affected: 3.5.0 to 3.5.2 |
Date Public
2017-10-09 00:00
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