Security advisory

{
  "id": "926a23c085e75355e7b4a59a96752d67e691fdaa0af8eb54381812a04cc12aad",
  "url": "https://osv.dev/vulnerability/CVE-2026-40970",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-40970",
    "summary": "When configured to use an SSL bundle, Spring Boot's Elasticsearch auto-configuration does not perform hostname verification when connecting to the Elasticsearch server. Affected: Spring Boot 4.0.0–4.0.5; upgrade to 4.0.6 or later per vendor advisory.",
    "evidence": "osv:CVE-2026-40970",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-40970",
      "aliases": [
        "CVE-2026-40970",
        "GHSA-c96x-rpm4-349p"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/spring-projects/spring-boot",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1c0e08b4c434b0e77a83098267b2a0f5a3fc56d7"
                },
                {
                  "fixed": "8821ad2cd381bb4b9615a61479e1de7305a8ba39"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.0.0"
                      },
                      {
                        "fixed": "4.0.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40970.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:45.991168277Z",
      "provider": "osv",
      "references": [
        "https://spring.io/security/cve-2026-40970",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40970.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-40970"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-295"
        ],
        "cna_assigner": "vmware",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "4.0.0"
                  },
                  {
                    "fixed": "4.0.6"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40970.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-40970",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 514302,
  "published_at": "2026-04-27T19:09:58.835+00:00"
}