CVE-2026-39429CRITICAL 9.1EPSS p34.7%

CVE-2026-39429CVE-2026-39429

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.

Scoring

CVSS 3.19.1 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS0.44% probability of exploitation · percentile 34.7% · 2026-06-19T12:03:05Z
Published2026-04-08
Last modified2026-04-15

Underlying weaknesses· 2

CWE-302CWE-862

References

  1. https://github.com/kcp-dev/kcp/releases/tag/v0.29.3
  2. https://github.com/kcp-dev/kcp/releases/tag/v0.30.3
  3. https://github.com/kcp-dev/kcp/security/advisories/GHSA-3j3q-wp9x-585p

2

TypeTargetConfidenceTier
WeaknessAuthentication Bypass by Assumed-Immutable Datacwe-3020%live
WeaknessMissing Authorizationcwe-8620%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.