Vulnerability in Linuxfoundation Strimzi
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 trusted certificates configuration of a Kafka Connect operand or of the target cluster in the Kafka MirrorMaker 2 operand, all of the certificates that are part of the CA chain will be trusted individually when connecting to the Apache Kafka cluster. Due to this error, the affected operand (Kafka Connect or Kafka MirrorMaker 2) might accept connections to Kafka brokers using server certificates signed by one of the other CAs in the CA chain and not just by the last CA in the chain. This issue is fixed in Strimzi 0.50.1.
Vulnerability class: Improper Certificate Validation
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (15.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Linuxfoundation Strimzi
- Strimzi Strimzi-Kafka-Operator — versions >= 0.47.0, < 0.51.1
Weakness classification (CWE)
References
- github.com/strimzi/strimzi-kafka-operator/security/advisories/GHSA-6x85-j2f7-4x… (Vendor Advisory)
- github.com/strimzi/strimzi-kafka-operator/releases/tag/0.50.1 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-27133?
- CVE-2026-27133 is a medium-severity vulnerability in Linuxfoundation Strimzi, 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.