JsonToObjectTransformer resolves the json__TypeId__ message header to an arbitrary class without an allow-list

{
  "id": "102d8053bd796f98db69d21c7773792f83d35664d9ec8dc5391df3ab48db9d3e",
  "url": "https://osv.dev/vulnerability/CVE-2026-47856",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "JsonToObjectTransformer resolves the json__TypeId__ message header to an arbitrary class without an allow-list",
    "summary": "Spring Integration's JSON to object conversion uses the json__TypeId__ header to choose the deserialization target type, and resolves that header value to a class with ClassUtils.forName and no type/package allow-list. Spring Integration 7.1.0 Spring Integration 7.0.0 - 7.0.5 Spring Integration 6.5.0 - 6.5.10 Spring Integration 6.4.0 - 6.4.12 Spring Integration 5.5.21 and earlier",
    "evidence": "osv:CVE-2026-47856",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-47856",
      "aliases": [
        "CVE-2026-47856"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/spring-projects/spring-integration",
              "type": "GIT",
              "events": [
                {
                  "introduced": "79963f89e3cab04addfe32aa4b419e5ffb73e909"
                },
                {
                  "fixed": "ae4c9bb8eff504f26b67cc6ac65fed2c8fb8382e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:vmware:spring_integration:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "7.1.0"
                      },
                      {
                        "fixed": "7.1.0.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47856.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.926150219Z",
      "provider": "osv",
      "references": [
        "https://spring.io/security/cve-2026-47856",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47856.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-47856"
      ],
      "provider_metadata": {
        "cna_assigner": "vmware",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "7.1.0"
                  },
                  {
                    "last_affected": "7.1.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandaloneSingleVersion"
              }
            ]
          },
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "7.0.0"
                  },
                  {
                    "last_affected": "7.0.5"
                  },
                  {
                    "introduced": "6.5.0"
                  },
                  {
                    "last_affected": "6.5.10"
                  },
                  {
                    "introduced": "6.4.0"
                  },
                  {
                    "last_affected": "6.4.12"
                  },
                  {
                    "last_affected": "5.5.21"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47856.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-47856",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490601,
  "published_at": "2026-08-26T23:28:43.829+00:00"
}