Security advisory

{
  "id": "de58d67cc7e8431bc3e411d6ec2d68c3fd2d9d4211e2bba4bd093802cc09caee",
  "url": "https://osv.dev/vulnerability/CVE-2026-44394",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-44394",
    "summary": "An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone federated token rescoping mechanism does not propagate the original token's expiry to the newly issued token. When a federated user rescopes a token via POST /v3/auth/tokens, the handle_scoped_token() function in the mapped authentication plugin returns response data without an expires_at value. The token provider falls back to issuing a token with a fresh default TTL. By rescoping repeatedly before each token expires, a user can maintain access indefinitely, bypassing operator-configured token lifetime policies. This is a variant of CVE-2012-3426. Only deployments using federated identity (SAML2, OpenID Connect) are affected.",
    "evidence": "osv:CVE-2026-44394",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-44394",
      "aliases": [
        "CVE-2026-44394",
        "GHSA-whqr-fgm5-x77q",
        "PYSEC-2026-603"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openstack/keystone",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c767e254979c96858a81cc4bbe8d9773d4dd539b"
                },
                {
                  "fixed": "b896b71557ce8370c442fe05818a74d7a9a623a8"
                },
                {
                  "introduced": "a568938e0c967a56ade269c93f42718008487b14"
                },
                {
                  "fixed": "3dfbbe7b9bd11dcd64420da0e4eda48b637f4a70"
                },
                {
                  "introduced": "3526925ae34a66e626bec985628a421a7694168e"
                },
                {
                  "fixed": "7b9f39226744b8db50a6d702cc5f715fc9c17f37"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "14.0.0"
                      },
                      {
                        "fixed": "27.0.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "28.0.0"
                      },
                      {
                        "fixed": "28.0.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "29.0.0"
                      },
                      {
                        "fixed": "29.0.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "29.0.1",
            "28.0.1",
            "29.0.0.0rc1",
            "29.0.0",
            "28.0.0.0rc1",
            "28.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44394.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.290365031Z",
      "provider": "osv",
      "references": [
        "https://bugs.launchpad.net/keystone/+bug/2150379",
        "https://security.openstack.org/ossa/OSSA-2026-015.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44394.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-44394"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-863"
        ],
        "cna_assigner": "mitre",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "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",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44394.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-44394",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517671,
  "published_at": "2026-05-28T00:00:00+00:00"
}