{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0.1.0-alpha.1"
                  },
                  {
                    "fixed": "0.1.0-alpha.3"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              },
              {
                "range": [
                  {
                    "fixed": "433bc99d2a2c10071167bf22acc2c930a12e64e1"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "original_tag": "v0.1.0-alpha.3",
                "range": [
                  {
                    "fixed": "866ff9bfd056f8f76ba22c9b45394aef6ce148a1"
                  }
                ],
                "source": "REFERENCES_TAG"
              }
            ]
          },
          "events": [
            {
              "introduced": "ffc3e6072383ea6e9cf3fbadc7cf473db448b364"
            },
            {
              "fixed": "866ff9bfd056f8f76ba22c9b45394aef6ce148a1"
            },
            {
              "fixed": "433bc99d2a2c10071167bf22acc2c930a12e64e1"
            }
          ],
          "repo": "https://github.com/google/agentmesh",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-r6hp-67wp-c7jx"
  ],
  "database_specific": {
    "cna_assigner": "Google",
    "cwe_ids": [
      "CWE-306",
      "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102503.json"
  },
  "details": "Missing Authentication for Critical Function (CWE-306) and Missing Authorization (CWE-862) in the /libp2p-http ingress server (StartIngressServer in cmd/sam-node/node.go) in Google OSS Agent Mesh (SAM) versions 0.1.0-alpha.1 through 0.1.0-alpha.2 allow an unauthenticated remote libp2p peer to bypass Biscuit capability policy enforcement and invoke arbitrary registered backend services (including command/stdio-backed MCP servers, A2A, and inference endpoints). While the MCP protocol stream handler enforces WithBiscuitAuth and Authorize checks, the parallel /libp2p-http ingress routes requests directly to backend service handlers without verifying a Biscuit token or mesh enrollment. Users should upgrade to version 0.1.0-alpha.3 or later.",
  "id": "CVE-2026-102503",
  "modified": "2026-10-21T02:31:08.856546867Z",
  "published": "2026-10-19T02:20:35.753Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102503.json"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/google/agentmesh/security/advisories/GHSA-r6hp-67wp-c7jx"
    },
    {
      "type": "FIX",
      "url": "https://github.com/google/sam/commit/433bc99d2a2c10071167bf22acc2c930a12e64e1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/google/sam/releases/tag/v0.1.0-alpha.3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/google/sam/security/advisories/GHSA-r6hp-67wp-c7jx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-102503"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Missing Authentication on /libp2p-http Ingress in Google OSS Agent Mesh (SAM)"
}