CVE-2026-32588: Apache Cassandra: Authenticated DoS via ALTER ROLE Password Hashing

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-07 · updated 2026-10-26
Weakness: CWE-400

Description

Authenticated DoS over CQL in Apache Cassandra 4.0, 4.1, 5.0 allows authenticated user to raise query latencies via repeated password changes. Users are recommended to upgrade to version 4.0.20, 4.1.11, 5.0.7, which fixes this issue.

Affected products

Apache Software Foundation Apache Cassandra: from 4.0.0 before 4.0.20; from 4.1.0 before 4.1.11; from 5.0.0 before 5.0.7 — fixed in 4.0.20, 4.1.11, 5.0.7

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Cassandra 4.0.20, 4.1.11, 5.0.7. Check the vendor advisory for mitigations.

References

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