Privilege escalation vulnerability in Apache Cassandra 5.0 via MutualTLS
CVE-2026-27314

8.8HIGH

Key Information:

Vendor

Apache
Status
Apache Cassandra
Vendor
CVE Published:
7 April 2026

What is CVE-2026-27314?

A privilege escalation vulnerability in Apache Cassandra 5.0 exists in environments utilizing Mutual TLS with the MutualTlsAuthenticator. This flaw allows an attacker with only CREATE permission to associate their own certificate identity with an arbitrary role, including the potential for superuser access. By exploiting this vulnerability, the attacker can authenticate using the compromised role through the ADD IDENTITY command. Users are strongly advised to upgrade to version 5.0.7 or later to mitigate this security risk.

Affected Version(s)

Apache Cassandra 5.0 <= 5.0.6

References

https://lists.apache.org/thread/zrng82ddy4rpsmfyk582v6hqx...
vendor-advisory

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Sho Odagiri, GMO Cybersecurity by Ierae, Inc.
.