CVE-2026-39429

critical

Description

kcp is a Kubernetes-like control plane for form-factors and use-cases beyond Kubernetes and container workloads. Prior to 0.30.3 and 0.29.3, the cache server is directly exposed by the root shard and has no authentication or authorization in place. This allows anyone who can access the root shard to read and write to the cache server. This vulnerability is fixed in 0.30.3 and 0.29.3.

References

https://github.com/kcp-dev/kcp/security/advisories/GHSA-3j3q-wp9x-585p

https://github.com/kcp-dev/kcp/releases/tag/v0.30.3

https://github.com/kcp-dev/kcp/releases/tag/v0.29.3

Details

Source: Mitre, NVD

Published: 2026-04-08

Updated: 2026-04-15

Risk Information

CVSS v2

Base Score: 9.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N

Severity: High

CVSS v3

Base Score: 9.1

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Severity: Critical

EPSS

EPSS: 0.00067