{"cve":"CVE-2025-55205","nvd":{"published":"2025-08-18T17:15:30.117","modified":"2026-06-17T09:41:27.337","status":"Deferred","description":"Capsule is a multi-tenancy and policy-based framework for Kubernetes. A namespace label injection vulnerability in Capsule v0.10.3 and earlier allows authenticated tenant users to inject arbitrary labels into system namespaces (kube-system, default, capsule-system), bypassing multi-tenant isolation and potentially accessing cross-tenant resources through TenantResource selectors. This vulnerability enables privilege escalation and violates the fundamental security boundaries that Capsule is designed to enforce. This vulnerability is fixed in 0.10.4.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","score":9.0},"cwes":["CWE-863"],"references":["https://github.com/projectcapsule/capsule/commit/e1f47feade6e1695b2204407607d07c3b3994f6e","https://github.com/projectcapsule/capsule/security/advisories/GHSA-fcpm-6mxq-m5vv"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:06:45.861874017+00:00"},"epss":{"cve":"CVE-2025-55205","score":0.0046,"percentile":0.39853,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-fcpm-6mxq-m5vv","url":"https://osv.dev/vulnerability/GHSA-fcpm-6mxq-m5vv","summary":"Capsule tenant owners with \"patch namespace\" permission can hijack system namespaces label","modified":"2025-08-29T20:35:24Z","packages":[{"ecosystem":"Go","name":"github.com/projectcapsule/capsule","purl":"pkg:golang/github.com/projectcapsule/capsule","ranges":["<0.10.4"],"fixed":["0.10.4"]}]},{"id":"GO-2025-3893","url":"https://osv.dev/vulnerability/GO-2025-3893","summary":"Capsule tenant owners with \"patch namespace\" permission can hijack system namespaces label in github.com/projectcapsule/capsule","modified":"2026-03-03T04:56:50.237805Z","packages":[{"ecosystem":"Go","name":"github.com/projectcapsule/capsule","purl":"pkg:golang/github.com/projectcapsule/capsule","ranges":["<0.10.4"],"fixed":["0.10.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}