How severe is CVE-2026-27133?

CVE-2026-27133 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-27133 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27133?

CVE-2026-27133 affects Linuxfoundation Strimzi. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27133?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-27133 have an EU (EUVD) identifier?

Yes. CVE-2026-27133 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7764.

When was CVE-2026-27133 published?

CVE-2026-27133 was published on 2026-02-20 and last updated on 2026-06-17.

CVE-2026-27133

CVE-2026-27133 is a medium-severity vulnerability in Linuxfoundation Strimzi with a CVSS 3.x base score of 5.9. 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-295.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7764
Weakness: CWE-295
Affected product: Linuxfoundation Strimzi
Published: 2026-02-20
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-27133?: CVE-2026-27133 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-27133 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27133?: CVE-2026-27133 affects Linuxfoundation Strimzi. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27133?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-27133 have an EU (EUVD) identifier?: Yes. CVE-2026-27133 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7764.
When was CVE-2026-27133 published?: CVE-2026-27133 was published on 2026-02-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:linuxfoundation:strimzi:*:*:*:*:*:*:*:*

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