CVE-2026-59739
published 2026-09-16CVE-2026-59739: Information disclosure via SetWatches reconnect replay in Apache ZooKeeper due to missing ACL check. An attacker can discover ACL-restricted paths by…
PriorityP345high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
EPSS
0.55%
45.4th percentile
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.
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apache | zookeeper | — | — |
| apache | zookeeper | >= 3.8.0 < 3.8.7 | 3.8.7 |
| apache | zookeeper | >= 3.9.0 < 3.9.6 | 3.9.6 |
| offline-knowledge-portal | rhokp-rhel9 | — | — |
| rhoai | odh-modelmesh-rhel9 | — | — |
| rhoai | odh-spark-operator-rhel9 | — | — |
| rhoai | odh-th-torch-cpu-py312-rhel9 | — | — |
| rhoai | odh-th-torch-cuda-py312-rhel9 | — | — |
| rhoai | odh-th06-cpu-torch210-py312-rhel9 | — | — |
| rhoai | odh-th06-cpu-torch291-py312-rhel9 | — | — |
| rhoai | odh-th06-cuda130-torch210-py312-rhel9 | — | — |
| rhoai | odh-th06-cuda130-torch291-py312-rhel9 | — | — |
| rhoai | odh-th06-rocm64-torch291-py312-rhel9 | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
vendor_redhat5.3MEDIUM
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VulDB
Apache ZooKeeper information disclosure
vuldb·2026-09-21·CVSS 7.5
CVE-2026-59739 [HIGH] Apache ZooKeeper information disclosure
A vulnerability categorized as problematic has been discovered in Apache ZooKeeper. This vulnerability affects unknown code. Executing a manipulation can lead to information disclosure.
This vulnerability is registered as CVE-2026-59739. It is possible to launch the attack remotely. No exploit is available.
GHSA
Information disclosure via SetWatches reconnect replay in Apache ZooKeeper due to missing ACL check.
ghsa_unreviewed·2026-09-16·CVSS 5.3
CVE-2026-59739 [MEDIUM] CWE-862 Information disclosure via SetWatches reconnect replay in Apache ZooKeeper due to missing ACL check.
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 recomm
Red Hat
zookeeper: Apache ZooKeeper: Information disclosure via SetWatches reconnect replay
vendor_redhat·2026-09-16·CVSS 5.3
CVE-2026-59739 [MEDIUM] CWE-425 zookeeper: Apache ZooKeeper: Information disclosure via SetWatches reconnect replay
zookeeper: Apache ZooKeeper: Information disclosure via SetWatches reconnect replay
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 informat
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-59739 golang-github-samuel-zookeeper: Apache ZooKeeper: Information disclosure via SetWatches reconnect replay [fedora-all]
bugzilla·2026-09-28·CVSS 5.3
CVE-2026-59739 [MEDIUM] CVE-2026-59739 golang-github-samuel-zookeeper: Apache ZooKeeper: Information disclosure via SetWatches reconnect replay [fedora-all]
CVE-2026-59739 golang-github-samuel-zookeeper: Apache ZooKeeper: Information disclosure via SetWatches reconnect replay [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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 SetWat
Bugzilla
CVE-2026-59739 golang-github-zookeeper-zk: Apache ZooKeeper: Information disclosure via SetWatches reconnect replay [epel-all]
bugzilla·2026-09-28·CVSS 5.3
CVE-2026-59739 [MEDIUM] CVE-2026-59739 golang-github-zookeeper-zk: Apache ZooKeeper: Information disclosure via SetWatches reconnect replay [epel-all]
CVE-2026-59739 golang-github-zookeeper-zk: Apache ZooKeeper: Information disclosure via SetWatches reconnect replay [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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/S
Bugzilla
CVE-2026-59739 golang-github-zookeeper-zk: Apache ZooKeeper: Information disclosure via SetWatches reconnect replay [fedora-all]
bugzilla·2026-09-28·CVSS 5.3
CVE-2026-59739 [MEDIUM] CVE-2026-59739 golang-github-zookeeper-zk: Apache ZooKeeper: Information disclosure via SetWatches reconnect replay [fedora-all]
CVE-2026-59739 golang-github-zookeeper-zk: Apache ZooKeeper: Information disclosure via SetWatches reconnect replay [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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
Bugzilla
CVE-2026-59739 zookeeper: Apache ZooKeeper: Information disclosure via SetWatches reconnect replay
bugzilla·2026-09-16·CVSS 5.3
CVE-2026-59739 [MEDIUM] CVE-2026-59739 zookeeper: Apache ZooKeeper: Information disclosure via SetWatches reconnect replay
CVE-2026-59739 zookeeper: Apache ZooKeeper: Information disclosure via SetWatches reconnect replay
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 sen
2026-09-16
Published