High severity8.2NVD Advisory· Published Apr 8, 2026· Updated Apr 15, 2026
CVE-2026-39429
CVE-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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/kcp-dev/kcpGo | >= 0.30.0, < 0.30.3 | 0.30.3 |
github.com/kcp-dev/kcpGo | < 0.29.3 | 0.29.3 |
Affected products
17- osv-coords16 versionspkg:apk/chainguard/kcp-0.29pkg:apk/chainguard/kcp-0.29-cache-serverpkg:apk/chainguard/kcp-0.29-front-proxypkg:apk/chainguard/kcp-0.29-virtual-workspacespkg:apk/chainguard/kcp-0.30pkg:apk/chainguard/kcp-0.30-cache-serverpkg:apk/chainguard/kcp-0.30-front-proxypkg:apk/chainguard/kcp-0.30-virtual-workspacespkg:apk/chainguard/kcp-fips-0.29pkg:apk/chainguard/kcp-fips-0.29-cache-serverpkg:apk/chainguard/kcp-fips-0.29-front-proxypkg:apk/chainguard/kcp-fips-0.29-virtual-workspacespkg:apk/chainguard/kcp-fips-0.30pkg:apk/chainguard/kcp-fips-0.30-front-proxypkg:apk/chainguard/kcp-fips-0.30-virtual-workspacespkg:golang/github.com/kcp-dev/kcp
< 0.30.3-r0+ 15 more
- (no CPE)range: < 0.30.3-r0
- (no CPE)range: < 0.30.3-r0
- (no CPE)range: < 0.30.3-r0
- (no CPE)range: < 0.30.3-r0
- (no CPE)range: < 0.30.3-r0
- (no CPE)range: < 0.30.3-r0
- (no CPE)range: < 0.30.3-r0
- (no CPE)range: < 0.30.3-r0
- (no CPE)range: < 0.30.3-r1
- (no CPE)range: < 0.30.3-r1
- (no CPE)range: < 0.30.3-r1
- (no CPE)range: < 0.30.3-r1
- (no CPE)range: < 0.30.3-r0
- (no CPE)range: < 0.30.3-r0
- (no CPE)range: < 0.30.3-r0
- (no CPE)range: >= 0.30.0, < 0.30.3
Patches
Vulnerability mechanics
References
5- github.com/kcp-dev/kcp/security/advisories/GHSA-3j3q-wp9x-585pnvdExploitMitigationVendor AdvisoryWEB
- github.com/advisories/GHSA-3j3q-wp9x-585pghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-39429ghsaADVISORY
- github.com/kcp-dev/kcp/releases/tag/v0.29.3nvdRelease NotesWEB
- github.com/kcp-dev/kcp/releases/tag/v0.30.3nvdRelease NotesWEB
News mentions
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