How severe is CVE-2026-27314?

CVE-2026-27314 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-27314 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27314?

CVE-2026-27314 affects Apache Cassandra. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27314?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-27314 have an EU (EUVD) identifier?

Yes. CVE-2026-27314 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19761.

When was CVE-2026-27314 published?

CVE-2026-27314 was published on 2026-04-07 and last updated on 2026-06-17.

CVE-2026-27314

CVE-2026-27314 is a high-severity vulnerability in Apache Cassandra with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-267.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19761
Weakness: CWE-267
Affected product: Apache Cassandra
Published: 2026-04-07
Last modified: 2026-06-17

Description

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 authenticate as that role via ADD IDENTITY. Users are recommended to upgrade to version 5.0.7+, which fixes this issue.

Frequently asked questions

What is 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 authenticate as that role via ADD IDENTITY. Users are recommended to upgrade to version 5.0.7+, which fixes this issue.
How severe is CVE-2026-27314?: CVE-2026-27314 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-27314 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27314?: CVE-2026-27314 affects Apache Cassandra. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27314?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-27314 have an EU (EUVD) identifier?: Yes. CVE-2026-27314 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19761.
When was CVE-2026-27314 published?: CVE-2026-27314 was published on 2026-04-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:cassandra:*:*:*:*:*:*:*:*

More vulnerabilities in Apache Cassandra

CVE-2018-8016 — Critical (CVSS 9.8): The default configuration in Apache Cassandra 3.8 through 3.11.1 binds an unauthenticated JMX/RMI interface to all…
CVE-2016-3427 — Critical (CVSS 9.8): Unspecified vulnerability in Oracle Java SE 6u113, 7u99, and 8u77; Java SE Embedded 8u77; and JRockit R28.3.9 allows…
CVE-2021-44521 — Critical (CVSS 9.1): When running Apache Cassandra with the following configuration: enable_user_defined_functions: true…
CVE-2025-26467 — High (CVSS 8.8): Privilege Defined With Unsafe Actions vulnerability in Apache Cassandra. An user with MODIFY permission ON ALL…
CVE-2025-23015 — High (CVSS 8.8): Privilege Defined With Unsafe Actions vulnerability in Apache Cassandra. An user with MODIFY permission ON ALL…
CVE-2023-30601 — High (CVSS 7.8): Privilege escalation when enabling FQL/Audit logs allows user with JMX access to run arbitrary commands as the user…

All CVEs affecting Apache Cassandra →

Other CWE-267 vulnerabilities

CVE-2023-22647 — Critical (CVSS 9.9): An Improper Privilege Management vulnerability in SUSE Rancher allowed standard users to leverage their existing…
CVE-2026-29646 — Critical (CVSS 9.8): In OpenXiangShan NEMU prior to 55295c4, when running with RVH (Hypervisor extension) enabled, a VS-mode guest write to…
CVE-2021-44547 — Critical (CVSS 9.1): A sandboxing issue in Odoo Community 15.0 and Odoo Enterprise 15.0 allows authenticated administrators to executed…
CVE-2025-14349 — High (CVSS 8.8): Privilege Defined With Unsafe Actions, Missing Authentication for Critical Function vulnerability in Universal Software…
CVE-2026-0945 — High (CVSS 8.8): Privilege Defined With Unsafe Actions vulnerability in Drupal Role Delegation allows Privilege Escalation.This issue…
CVE-2026-23526 — High (CVSS 8.8): CVAT is an open source interactive video and image annotation tool for computer vision. In versions 1.0.0 through…

Browse all CWE-267 vulnerabilities →