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CVE-2026-39429

Published: Apr 8, 2026

Modified: Apr 10, 2026

PUBLISHED

CVSS v3.1

8.2

HIGH

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.

Vendor	Product	Versions
kcp-dev	kcp	affected `>= 0.30.0, < 0.30.3` affected `< 0.29.3`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

None

References

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

x_refsource_CONFIRM

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

x_refsource_MISC

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

x_refsource_MISC

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