What is CVE-2026-27314?

CVE-2026-27314 is a high-severity vulnerability in Apache Cassandra, classified under Privilege Defined With Unsafe Actions. CVSS score: 8.8/10. Published 2026-04-07.

How severe is CVE-2026-27314?

High severity. CVSS v3 base score is 8.8 out of 10.

Privilege escalation in Apache Cassandra

CVE-2026-27314

Privilege escalation in Apache Cassandra 5.0 on an mTLS environment using MutualTlsAuthenticator allows a user with only CREATE permission to associate their own certificate identity with an arbitrary role, including a superuser role, and…

EPSS: 0.003 (18.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apache Cassandra
Apache Software Foundation Cassandra — versions 5.0

Weakness classification (CWE)

CWE-267 — Privilege Defined With Unsafe Actions

References

security@apache.org (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-27314?: CVE-2026-27314 is a high-severity vulnerability in Apache Cassandra, classified under Privilege Defined With Unsafe Actions. CVSS score: 8.8/10. Published 2026-04-07.
How severe is CVE-2026-27314?: High severity. CVSS v3 base score is 8.8 out of 10.