CVE WatchSep 24, 2026

CVE-2026-61682

kcp is a Kubernetes-like control plane for form-factors and use-cases beyond Kubernetes and container workloads. Prior to 0.31.4 and 0.32.2,

CVSS

9.9

Critical

EPSS

0.4%

p33

KEV

—

Exploit Today

0-100

Published: Sep 18, 2026 · Last modified: Sep 24, 2026 · CWE-290 · CWE-302 · CWE-348

EPSS · 30d

0.4%EPSS · 30 days0.4%

2026-10-082026-11-05

Technical description

kcp is a Kubernetes-like control plane for form-factors and use-cases beyond Kubernetes and container workloads. Prior to 0.31.4 and 0.32.2, the kcp front-proxy does not remove inbound X-Remote-User, X-Remote-Group, or X-Remote-Extra-* identity headers before forwarding requests to shards. Any authenticated tenant can inject X-Remote-Group: system:masters, authorization.kcp.io/warrant, authentication.kcp.io/scopes, or a group used for per-workspace required-group gating, and the shard trusts these values as authenticated identity assertions. This allows cross-workspace impersonation, authorization bypass, and arbitrary reading, writing, or deletion of resources, secrets, RBAC data, APIExports, APIBindings, and LogicalClusters. This issue is fixed in versions 0.31.4 and 0.32.2.

Official references

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