High 8.2Published Apr 8, 2026

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

Updated under an hour ago (Oct 27, 2026, 11:20 AM ET)

Does this affect you?

It affects kcp-dev kcp and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for kcp-dev kcp

Exploited in the last 30 days

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.

CVSS: 8.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Weakness (CWE): CWE-862, CWE-302
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Apr 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

kcp-dev kcp kcp_dev:kcp (from the name)	from 0.30.0, < 0.30.3; before 0.29.3	CNA record
kcp kcp kcp:kcp	before 0.29.3; from 0.30.0 before 0.30.3	NVD

References

References

https://github.com/kcp-dev/kcp/security/advisories/GHSA-3j3q-wp9x-585p	x-refsource-confirm, exploit, mitigation, vendor-advisory
https://github.com/kcp-dev/kcp/releases/tag/v0.29.3	x-refsource-misc, release-notes
https://github.com/kcp-dev/kcp/releases/tag/v0.30.3	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.