Apache Impala: SAML authentication bypass via forged bearer token

{
  "id": "3155625cedcbe162eaeb12293165d5a5dca2f42ee3de7b616ec0176a36365295",
  "url": "https://osv.dev/vulnerability/CVE-2026-56207",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Apache Impala: SAML authentication bypass via forged bearer token",
    "summary": "Signature of Bearer token is not verified in last step of SAML2 authentication for Impala's hs2-http interface, allowing altering user name and acting as another user. This issue affects Apache Impala: >=4.0.0. Users are recommended to upgrade to version 4.5.2, which fixes this issue.",
    "evidence": "osv:CVE-2026-56207",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-56207",
      "aliases": [
        "CVE-2026-56207"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apache/impala",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1950394e56927cac2f101324fa0397aa3d378f2d"
                },
                {
                  "fixed": "078470bb0471336fa7715cf9b72a5d713fd2751d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:impala:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.0.0"
                      },
                      {
                        "fixed": "4.5.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56207.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:34.745948469Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56207.json",
        "https://lists.apache.org/thread/20cov78py0zqzx7dyq39ktythkwn91zs",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-56207"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-347"
        ],
        "cna_assigner": "apache",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "4.0.0"
                  },
                  {
                    "last_affected": "4.5.1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56207.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-56207",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 502106,
  "published_at": "2026-09-09T10:36:55.238+00:00"
}