CVE-2026-39429 HIGH

CVE-2026-39429: kcp's cache server is accessible without authentication or authorization checks

Vendor Kcp-Dev
Product kcp
Weakness CWE-862 · Missing authorization
Published April 8, 2026
Last update April 10, 2026

CVSS base score

8.2/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 8, 2026 CVE published
April 10, 2026 Record updated

Related vulnerabilities

04Related CVE