{
  "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/2026/43xxx/CVE-2026-43001.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. POST /v3/credentials did not validate that the caller-supplied project_id for an EC2-type credential matched the project of the authenticating application credential. This allowed an attacker holding an unrestricted application credential for project A to create an EC2 credential targeting project B; a subsequent /v3/ec2tokens exchange would then issue a Keystone token scoped to project B while still carrying the original app_cred_id, enabling cross-project lateral movement within the credential owner's role footprint.",
  "id": "CVE-2026-43001",
  "modified": "2026-07-08T05:37:09.666834647Z",
  "published": "2026-05-01T00:00:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://bugs.launchpad.net/keystone/+bug/2149775"
    },
    {
      "type": "WEB",
      "url": "https://review.opendev.org/c/openstack/keystone/+/985804"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43001.json"
    },
    {
      "type": "WEB",
      "url": "https://security.openstack.org/ossa/OSSA-2026-015.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/security/cve/CVE-2026-43001"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43001.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43001"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464305"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L",
      "type": "CVSS_V3"
    }
  ]
}