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CVE-2026-30963

Capsule is a multi-tenancy and policy-based framework for Kubernetes. To defend against namespace hijacking achieved through update/patch operations on namespaces, Capsule uses a webhook to validate update requests targeting namespaces. However, in Kubernetes, the namespace/finalize and namespace/status subresource APIs can also modify various fields of a namespace, including the metadata field. Prior to version 0.13.0, the webhook does not define interception rules for these subresources. As a
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:bf87f9baa8007bd5d978ad298eb239ac9533e5020fba4500e58642498073eabd
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"capsule","vendor":"projectcapsule","versions":[{"status":"affected","version":"< 0.13.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e42bc3b0fb19fb1a8f165a9dc3f2dba7641428937b25659448def074bd8f3554 · sha256:121b2ee656dccd80… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":3.9,"baseSeverity":"LOW","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e42bc3b0fb19fb1a8f165a9dc3f2dba7641428937b25659448def074bd8f3554 · sha256:121b2ee656dccd80… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e42bc3b0fb19fb1a8f165a9dc3f2dba7641428937b25659448def074bd8f3554 · sha256:121b2ee656dccd80… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/projectcapsule/capsule/releases/tag/v0.13.0","tags":["x_refsource_MISC"],"url":"https://github.com/projectcapsule/capsule/releases/tag/v0.13.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e42bc3b0fb19fb1a8f165a9dc3f2dba7641428937b25659448def074bd8f3554 · sha256:121b2ee656dccd80… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/projectcapsule/capsule/security/advisories/GHSA-2ww6-hf35-mfjm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e42bc3b0fb19fb1a8f165a9dc3f2dba7641428937b25659448def074bd8f3554 · sha256:121b2ee656dccd80… · /containers/adp/0/references/0
{"name":"https://github.com/projectcapsule/capsule/security/advisories/GHSA-2ww6-hf35-mfjm","tags":["x_refsource_CONFIRM"],"url":"https://github.com/projectcapsule/capsule/security/advisories/GHSA-2ww6-hf35-mfjm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e42bc3b0fb19fb1a8f165a9dc3f2dba7641428937b25659448def074bd8f3554 · sha256:121b2ee656dccd80… · /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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