{"id":"CVE-2023-46254","aliases":["GHSA-6758-979h-249x"],"title":"capsule-proxy service discloses Namespaces of colliding tenants to owners of different tenants with the same ServiceAccount name","summary":"capsule-proxy service discloses Namespaces of colliding tenants to owners of different tenants with the same ServiceAccount name","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","vendor":"projectcapsule","product":"github.com/projectcapsule/capsule","ecosystem":"go","affected":["github.com/projectcapsule/capsule < 0.4.5","github.com/projectcapsule/capsule-proxy < 0.4.5"],"patched":["github.com/projectcapsule/capsule 0.4.5","github.com/projectcapsule/capsule-proxy 0.4.5"],"published":"2023-11-07","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:50:04.088051430Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-6758-979h-249x","references":[{"url":"https://github.com/projectcapsule/capsule-proxy/security/advisories/GHSA-6758-979h-249x"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-46254"},{"url":"https://github.com/projectcapsule/capsule-proxy/commit/615202f7b02eaec7681336bd63daed1f39ae00c5"},{"url":"https://github.com/projectcapsule/capsule-proxy"},{"url":"https://github.com/projectcapsule/capsule-proxy/releases/tag/v0.4.5"}],"tags":["osv","go"],"epss":0.00415,"epssPercentile":0.35339,"ingestedAt":"2026-09-12T03:13:01.757Z","slug":"CVE-2023-46254","body":"## Overview\n\n### Summary\n\nA bug in the RoleBinding reflector used by `capsule-proxy` gives ServiceAccount tenant owners the right to list Namespaces of other tenants backed by the same owner kind and name.\n\n### Details\n\n- Tenant `solar`, owned by a ServiceAccount named `tenant-owner` in the Namespace `solar`\n- Tenant `wind`, owned by a ServiceAccount named `tenant-owner` in the Namespace `wind`\n\n> Please, notice the same ServiceAccount name, although in different namespaces.\n\nThe Tenant owner `solar` would be able to list the namespaces of the Tenant `wind` and vice-versa, although this is not correct.\n\nThe bug introduces an exfiltration vulnerability since allows the listing of Namespace resources of other Tenants, although just in some specific conditions:\n\n1. `capsule-proxy` runs with the `--disable-caching=false` (default value: `false`)\n2. Tenant owners are ServiceAccount, with the same resource name, but in different Namespaces.\n\nThe CVE doesn't allow any privilege escalation on the outer tenant Namespace-scoped resources, since the Kubernetes RBAC is enforcing this.\n\n## Affected packages\n\n- `github.com/projectcapsule/capsule < 0.4.5`\n- `github.com/projectcapsule/capsule-proxy < 0.4.5`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `github.com/projectcapsule/capsule 0.4.5`\n- `github.com/projectcapsule/capsule-proxy 0.4.5`","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}