MCP Java-SDK has a DNS Rebinding Vulnerability

{
  "id": "51d9e17398e7cd6ccb0edadc8143f9b5f384cfdeafc1a83d8c5f57dd33614cc1",
  "url": "https://osv.dev/vulnerability/CVE-2026-35568",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "MCP Java-SDK has a DNS Rebinding Vulnerability",
    "summary": "MCP Java SDK is the official Java SDK for Model Context Protocol servers and clients. Prior to 1.0.0, the java-sdk contains a DNS rebinding vulnerability. This vulnerability allows an attacker to access a locally or network-private java-sdk MCP server via a victims browser that is either local, or network adjacent. This allows an attacker to make any tool call to the server as if they were a locally running MCP connected AI agent. This vulnerability is fixed in 1.0.0.",
    "evidence": "osv:CVE-2026-35568",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-35568",
      "aliases": [
        "CVE-2026-35568",
        "GHSA-8jxr-pr72-r468"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/modelcontextprotocol/java-sdk",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3c87155b9ac11ab3f72dfc01d2238510537de69a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.0.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "3c87155b9ac11ab3f72dfc01d2238510537de69a"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.0.0"
                  },
                  {
                    "cpe": "cpe:2.3:a:lfprojects:mcp_java_sdk:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.0.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.6.0",
            "v0.5.0",
            "v0.4.2",
            "v0.4.1",
            "v0.4.0",
            "v0.3.1",
            "v0.3.0",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-35568.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:34.003435464Z",
      "provider": "osv",
      "references": [
        "https://github.com/modelcontextprotocol/java-sdk/releases/tag/v1.0.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35568.json",
        "https://github.com/modelcontextprotocol/java-sdk/security/advisories/GHSA-8jxr-pr72-r468",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-35568"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-346"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35568.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-35568",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 500966,
  "published_at": "2026-04-07T21:06:10.438+00:00"
}