CVE-2026-39429

HIGH

kcp's cache server is accessible without authentication or authorization checks

Title source: cna
STIX 2.1

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 (3)

Scores

CVSS v3 8.2
EPSS 0.0008
EPSS Percentile 23.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-302 CWE-862
Status published
Products (4)
kcp/kcp < 0.29.3
kcp-dev/kcp 0.30.0 - 0.30.3Go
kcp-dev/kcp < 0.29.3
kcp-dev/kcp >= 0.30.0, < 0.30.3
Published Apr 08, 2026
Tracked Since Apr 09, 2026