CVE-2026-88808

{
  "etk_id": "ETK-2026-3200",
  "cve_id": "CVE-2026-88808",
  "display_id": "CVE-2026-88808",
  "ghsa_id": "GHSA-q9v4-358v-r8q5",
  "euvd_id": "EUVD-2026-88335",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Improper authorization in Fleet downstream resource copying",
  "summary": "Affected Fleet releases authorize downstream Secret and ConfigMap copies with the agent identity rather than the deployment ServiceAccount. A tenant permitted to create Fleet deployment resources can create target namespaces or replace named Secrets and ConfigMaps outside their intended downstream permissions, particularly where tenants share clusters.",
  "mitigation": "Upgrade Fleet to v0.16.2, v0.15.7, or v0.14.11, as appropriate. Pin least-privilege ServiceAccounts to deployments and enforce their use; until upgraded, restrict who can create or modify Bundle, GitRepo, and HelmOp resources, and disable EXPERIMENTAL_COPY_RESOURCES_DOWNSTREAM on Rancher 2.13 and 2.14.",
  "vendor": "suse",
  "product": "go:github.com/rancher/fleet",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">=v0.16.0",
        "<v0.16.2"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "v0.16.2"
      ],
      "package_name": "github.com/rancher/fleet",
      "purl": "pkg:golang/github.com/rancher/fleet"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">=v0.15.0",
        "<v0.15.7"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "v0.15.7"
      ],
      "package_name": "github.com/rancher/fleet",
      "purl": "pkg:golang/github.com/rancher/fleet"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">=v0.14.0",
        "<v0.14.11"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "v0.14.11"
      ],
      "package_name": "github.com/rancher/fleet",
      "purl": "pkg:golang/github.com/rancher/fleet"
    }
  ],
  "cwes": [
    269
  ],
  "cvss_score": 9,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 90.77414648333334,
  "t0_at": "2026-09-28T15:36:13.506000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-09-28T15:36:13.506000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-28T15:36:13.506000+00:00",
      "url": "https://github.com/rancher/fleet/security/advisories/GHSA-q9v4-358v-r8q5"
    }
  }
}