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

What is CVE-2026-32588?

CVE-2026-32588 is a medium-severity denial of service vulnerability in Apache Cassandra, published on 7 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Weakness: CWE-400

Which versions are affected by CVE-2026-32588?

6 open source packages ship an affected version, including org.apache.cassandra:cassandra-all. It affects 1 product.

Products include Apache Cassandra.

How do I fix CVE-2026-32588?

Upgrade org.apache.cassandra:cassandra-all to a fixed version for your release line: 4.0.20, 4.1.11 or 5.0.7.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-32588 being exploited?

There is no known exploitation of CVE-2026-32588 in the wild and no public exploit code.

Other vulnerabilities in Apache Cassandra

• CVE-2016-3427 Oracle Java SE and JRockit Unspecified Exploited Critical 9.8
• CVE-2018-8016 Missing Authentication for Critical Function in Apache Cassandra Critical 9.8
• CVE-2021-44521 Remote code execution for scripted UDFs Critical 9.1
• CVE-2026-27314 Apache Cassandra: Privilege escalation via ADD IDENTITY authorization bypass High 8.8
• CVE-2025-26467 Apache Cassandra: User with MODIFY permission on ALL KEYSPACES can escalate privileges to superuser via unsafe actions (4.0.16 only) High 8.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-82673, CLEANSTART-2026-AO49375, CLEANSTART-2026-LG69060, GHSA-qffm-gf3j-6mvg, MINI-f48g-fq73-fg87.