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CVE-2026-39429

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2e1742585a0f4c55975766c9e8141555368bdf19250f715c3e0e20941ba40007
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-302","description":"CWE-302: Authentication Bypass by Assumed-Immutable Data","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1861d71432c4659b28762a978ef4a53ba442b224efa82950b206f7f9666373eb · sha256:23f5368dafb2b915… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-862","description":"CWE-862: Missing Authorization","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1861d71432c4659b28762a978ef4a53ba442b224efa82950b206f7f9666373eb · sha256:23f5368dafb2b915… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"kcp","vendor":"kcp-dev","versions":[{"status":"affected","version":">= 0.30.0, < 0.30.3"},{"status":"affected","version":"< 0.29.3"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1861d71432c4659b28762a978ef4a53ba442b224efa82950b206f7f9666373eb · sha256:23f5368dafb2b915… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1861d71432c4659b28762a978ef4a53ba442b224efa82950b206f7f9666373eb · sha256:23f5368dafb2b915… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-302","description":"CWE-302: Authentication Bypass by Assumed-Immutable Data","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1861d71432c4659b28762a978ef4a53ba442b224efa82950b206f7f9666373eb · sha256:23f5368dafb2b915… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-862","description":"CWE-862: Missing Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1861d71432c4659b28762a978ef4a53ba442b224efa82950b206f7f9666373eb · sha256:23f5368dafb2b915… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/kcp-dev/kcp/releases/tag/v0.29.3","tags":["x_refsource_MISC"],"url":"https://github.com/kcp-dev/kcp/releases/tag/v0.29.3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1861d71432c4659b28762a978ef4a53ba442b224efa82950b206f7f9666373eb · sha256:23f5368dafb2b915… · /containers/cna/references/1
{"name":"https://github.com/kcp-dev/kcp/releases/tag/v0.30.3","tags":["x_refsource_MISC"],"url":"https://github.com/kcp-dev/kcp/releases/tag/v0.30.3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1861d71432c4659b28762a978ef4a53ba442b224efa82950b206f7f9666373eb · sha256:23f5368dafb2b915… · /containers/cna/references/2
{"name":"https://github.com/kcp-dev/kcp/security/advisories/GHSA-3j3q-wp9x-585p","tags":["x_refsource_CONFIRM"],"url":"https://github.com/kcp-dev/kcp/security/advisories/GHSA-3j3q-wp9x-585p"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1861d71432c4659b28762a978ef4a53ba442b224efa82950b206f7f9666373eb · sha256:23f5368dafb2b915… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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