Cross-namespace FeatureFlagSource and InProcessConfiguration resolution exposes spec contents on multi-tenant clusters

{
  "id": "460e5eb90a21625aef38c21e0bdd0a328d4236a2845d71f2482d1e1de03cfe0f",
  "url": "https://osv.dev/vulnerability/CVE-2026-54495",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Cross-namespace FeatureFlagSource and InProcessConfiguration resolution exposes spec contents on multi-tenant clusters",
    "summary": "The OpenFeature Operator allows users to expose feature flags to applications. In version 0.9.2 and earlier, a tenant who can create a controller-owned workload can use the openfeature.dev/featureflagsource annotation with NAMESPACE/NAME syntax to reference a FeatureFlagSource or InProcessConfiguration in another namespace. On multi-tenant clusters that use namespaces as trust boundaries, the cluster-scoped operator reads that resource and materializes spec.envVars literal values, spec.httpSyncBearerToken, sync URIs, and supporting ConfigMaps into the tenant's workload. Single-tenant clusters are not impacted, secretKeyRef and configMapKeyRef values remain namespace-local, and creating a FeatureFlagSource is not required.",
    "evidence": "osv:CVE-2026-54495",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-54495",
      "aliases": [
        "CVE-2026-54495",
        "GHSA-398h-7f66-3h4p",
        "GO-2026-5998"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/open-feature/open-feature-operator",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "90d373fd1661c998ae22f95fb32367dcbfd2d86c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.9.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.9.2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.9.2",
            "api/v0.2.49",
            "v0.9.1",
            "api/v0.2.48",
            "v0.9.0",
            "api/v0.2.47",
            "apis/v0.2.46",
            "v0.8.9",
            "v0.8.8",
            "v0.8.7",
            "v0.8.6",
            "v0.8.5",
            "v0.8.4",
            "apis/v0.2.45",
            "api/v0.2.45",
            "v0.8.3",
            "v0.8.2",
            "v0.8.1",
            "v0.8.0",
            "v0.7.2",
            "v0.7.1",
            "apis/v0.2.44",
            "v0.7.0",
            "v0.6.1",
            "apis/v0.2.43",
            "v0.6.0",
            "v0.5.7",
            "apis/v0.2.42",
            "v0.5.6",
            "apis/v0.2.41",
            "v0.5.5",
            "apis/v0.2.40",
            "v0.5.4",
            "apis/v0.2.39",
            "v0.5.3",
            "v0.5.2",
            "v0.5.1",
            "v0.5.0",
            "apis/v0.2.38",
            "apis/v0.2.37",
            "v0.2.36",
            "v0.2.35",
            "v0.2.34",
            "v0.2.33",
            "v0.2.32",
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            "v0.2.30",
            "v0.2.29",
            "v0.2.28",
            "v0.2.27",
            "v0.2.26",
            "v0.2.25",
            "v0.2.24",
            "v0.2.23",
            "v0.2.22",
            "v0.2.21",
            "v0.2.20",
            "v0.2.19",
            "v0.2.18",
            "v0.2.17",
            "v0.2.16",
            "v0.2.15",
            "v0.2.14",
            "v0.2.13",
            "v0.2.12",
            "v0.2.11",
            "v0.2.10",
            "v0.2.9",
            "v0.2.8",
            "v0.2.7",
            "v0.2.6",
            "v0.2.5",
            "v0.2.4",
            "v0.2.3",
            "v0.2.2",
            "v0.2.1",
            "v0.2.0",
            "v0.1.1",
            "v0.1.0",
            "v0.0.9",
            "v0.0.8",
            "v0.0.7",
            "v0.0.6",
            "v0.0.5",
            "v0.0.4",
            "v0.0.3",
            "v0.0.2",
            "v0.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54495.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.479754138Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54495.json",
        "https://github.com/open-feature/open-feature-operator/security/advisories/GHSA-398h-7f66-3h4p",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-54495",
        "https://github.com/open-feature/open-feature-operator/issues/847"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-668"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54495.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-54495",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491981,
  "published_at": "2026-09-17T19:44:13.222+00:00"
}