CVE-2023-31416: Elastic Cloud on Kubernetes (ECK) secret token configuration issue

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-10-26 · updated 2026-06-17
Weakness: CWE-200

Description

Secret token configuration is never applied when using ECK <2.8 with APM Server >=8.0. This could lead to anonymous requests to an APM Server being accepted and the data ingested into this APM deployment.

Affected products

Elastic Cloud on Kubernetes: before 2.8 — fixed in 2.8

How to fix

Upgrade to a fixed version: Elastic Cloud on Kubernetes 2.8. Check the vendor advisory for mitigations.

References

https://discuss.elastic.co/t/elastic-cloud-on-kubernetes-eck-2-8-security-update/343854
https://www.elastic.co/community/security
https://discuss.elastic.co/t/elastic-cloud-on-kubernetes-eck-2-8-security-update/343854
https://www.elastic.co/community/security

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