CVE-2026-100300
Improper handling of exceptional conditions in the quota subsystem of Apache ZooKeeper allows an…
- Risk score
- 57/100
- CVSS
- 8.7 v4.0
- Published
- 4 Nov 2026
Open in the live forecast Today's forecast
What to know
- What it is
- Improper handling of exceptional conditions in the quota subsystem of Apache ZooKeeper allows an attacker able to write under the /zookeeper/quota subtree — unauthenticated on default deployments, where that subtree is world-writable — to crash the server's critical request-processing thread and render the on-disk dat…
- Affected
- See advisory
- Fix
- Upgrade the product to 3.8.8 or 3.9.7 (whichever matches your release line), or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 8.7 high
- Remotely exploitable without logging in
References
Original description
Improper handling of exceptional conditions in the quota subsystem of Apache ZooKeeper allows an attacker able to write under the /zookeeper/quota subtree — unauthenticated on default deployments, where that subtree is world-writable — to crash the server's critical request-processing thread and render the on-disk data directory permanently unbootable. This issue affects Apache ZooKeeper up to and including 3.9.6. Users are recommended to upgrade to version 3.8.8 or 3.9.7, which fixes the issue.
Last activity 4 Nov 2026. Patch Forecast updates every hour.