NVD security advisoryHigh
High advisory for Improper handling of exceptional conditi
CVE-2026-100300 · Reported 4 Nov 2026
Full advisory details, affected packages, severity context, and original source.
Affected technology
Improper handling of exceptional conditiAffected product
Advisory overview
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.