What is CVE-2026-27133?

CVE-2026-27133 is a medium-severity vulnerability in Strimzi Strimzi-kafka-operator, classified under Improper Certificate Validation. CVSS score: 5.9/10. Published 2026-02-20.

How severe is CVE-2026-27133?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Strimzi Strimzi-kafka-operator

CVE-2026-27133

Strimzi provides a way to run an Apache Kafka cluster on Kubernetes or OpenShift in various deployment configurations. From 0.47.0 to before 0.50.1, when a chain consisting of multiple CA (Certificate Authority) certificates is used in the…

Vulnerability class: Improper Certificate Validation

EPSS: 0.000 (1.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N.

Affected products

Strimzi Strimzi-kafka-operator — versions >= 0.47.0, < 0.51.1

Weakness classification (CWE)

References

https://github.com/strimzi/strimzi-kafka-operator/security/advisories/GHSA-6x85-j2f7-4xc5 (x_refsource_CONFIRM)
https://github.com/strimzi/strimzi-kafka-operator/releases/tag/0.50.1 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-27133?: CVE-2026-27133 is a medium-severity vulnerability in Strimzi Strimzi-kafka-operator, classified under Improper Certificate Validation. CVSS score: 5.9/10. Published 2026-02-20.
How severe is CVE-2026-27133?: Medium severity. CVSS v3 base score is 5.9 out of 10.