{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "14.0.0"
              },
              {
                "fixed": "27.0.2"
              },
              {
                "introduced": "28.0.0"
              },
              {
                "fixed": "28.0.2"
              },
              {
                "introduced": "29.0.0"
              },
              {
                "fixed": "29.0.2"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "c767e254979c96858a81cc4bbe8d9773d4dd539b"
            },
            {
              "fixed": "b896b71557ce8370c442fe05818a74d7a9a623a8"
            },
            {
              "introduced": "a568938e0c967a56ade269c93f42718008487b14"
            },
            {
              "fixed": "3dfbbe7b9bd11dcd64420da0e4eda48b637f4a70"
            },
            {
              "introduced": "3526925ae34a66e626bec985628a421a7694168e"
            },
            {
              "fixed": "7b9f39226744b8db50a6d702cc5f715fc9c17f37"
            }
          ],
          "repo": "https://github.com/openstack/keystone",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "mitre",
    "cwe_ids": [
      "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42999.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "14.0.0"
          },
          {
            "fixed": "27.0.2"
          },
          {
            "introduced": "28.0.0"
          },
          {
            "fixed": "28.0.2"
          },
          {
            "introduced": "29.0.0"
          },
          {
            "fixed": "29.0.2"
          }
        ],
        "source": "AFFECTED_FIELD"
      },
      {
        "extracted_events": [
          {
            "introduced": "14.0.0"
          },
          {
            "fixed": "27.0.2"
          },
          {
            "introduced": "28.0.0"
          },
          {
            "fixed": "28.0.2"
          },
          {
            "introduced": "29.0.0"
          },
          {
            "fixed": "29.0.2"
          }
        ],
        "source": "CPE_FIELD"
      },
      {
        "extracted_events": [
          {
            "fixed": "29.0.2"
          }
        ],
        "source": "DESCRIPTION"
      }
    ]
  },
  "details": "An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone RBAC policy enforcer in enforce_call unconditionally merges the raw JSON request body into the policy enforcement dictionary via policy_dict.update(json_input.copy()), overwriting trusted target data that was previously set from database lookups. Because flask.request.get_json is called with force=True, this works regardless of Content-Type or HTTP method. Any authenticated user can inject arbitrary policy target attributes (e.g., user_id, project_id) into the request body to bypass RBAC checks and perform unauthorized operations on resources belonging to other users or projects. This was introduced in commit 5ea59f52 (Rocky/14.0.0).",
  "id": "CVE-2026-42999",
  "modified": "2026-07-08T05:39:29.178928877Z",
  "published": "2026-05-28T00:00:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://bugs.launchpad.net/keystone/+bug/2148398"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42999.json"
    },
    {
      "type": "WEB",
      "url": "https://security.openstack.org/ossa/OSSA-2026-015.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/security/cve/CVE-2026-42999"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42999.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42999"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482840"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ]
}