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Mooncake through 0.3.13.post1 Missing Authentication in HTTP Metadata Server

Type: advisorySources: OSV

Mooncake through 0.3.13.post1 contains a missing authentication vulnerability in the HTTP metadata server /metadata handler that allows unauthenticated attackers to read, overwrite, and delete transfer engine metadata keys. Attackers can poison segment descriptors such as tcp_data_port or re-create rpc_meta entries to redirect KV cache transfers to attacker-controlled listeners, or exhaust server memory.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-103765
Confirmed fixed CVEs
Not specified
Updated in this feed
4 Nov 2026, 16:34 UTC · Revision 1

Source evidence

Mooncake through 0.3.13.post1 Missing Authentication in HTTP Metadata Server

core-osv · Original source

Published 1 Oct 2026, 23:19 UTC

Mooncake through 0.3.13.post1 contains a missing authentication vulnerability in the HTTP metadata server /metadata handler that allows unauthenticated attackers to read, overwrite, and delete transfer engine metadata keys. Attackers can poison segment descriptors such as tcp_data_port or re-create rpc_meta entries to redirect KV cache transfers to attacker-controlled listeners, or exhaust server memory.

osv:CVE-2026-103765
Complete source record
{
  "id": "b7736aeada61b8af1c0eaa529c8b765ccf5200e971e470c59e4df840d0cc7513",
  "url": "https://osv.dev/vulnerability/CVE-2026-103765",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Mooncake through 0.3.13.post1 Missing Authentication in HTTP Metadata Server",
    "summary": "Mooncake through 0.3.13.post1 contains a missing authentication vulnerability in the HTTP metadata server /metadata handler that allows unauthenticated attackers to read, overwrite, and delete transfer engine metadata keys. Attackers can poison segment descriptors such as tcp_data_port or re-create rpc_meta entries to redirect KV cache transfers to attacker-controlled listeners, or exhaust server memory.",
    "evidence": "osv:CVE-2026-103765",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-103765",
      "aliases": [
        "CVE-2026-103765"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/kvcache-ai/mooncake",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "719735896c86b56fabec6cf3e825fb2ea640597a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.3.13.post1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.3.13.post1"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.3.13.post1",
            "v0.3.13-rc2",
            "v0.3.13-rc1",
            "v0.3.13",
            "v0.3.12.post1",
            "v0.3.11-rc1",
            "v0.3.11.post1",
            "v0.3.11",
            "v0.3.10.post2",
            "v0.3.10.post1",
            "v0.3.10",
            "v0.3.9",
            "v0.3.8.post1",
            "v0.3.8",
            "v0.3.7.post2",
            "v0.3.7.post1",
            "v0.3.7",
            "v0.3.6.post1",
            "v0.3.6",
            "v0.3.5",
            "v0.3.4.post2",
            "v0.3.4.post1",
            "v0.3.4",
            "v0.3.3.post2",
            "v0.3.3.post1",
            "v0.3.3",
            "v0.3.2.post1",
            "v0.3.2",
            "v0.3.1",
            "v0.3.0",
            "v0.3.0-beta",
            "v0.3.0-alpha",
            "v0.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103765.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.338272255Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103765.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-103765",
        "https://www.vulncheck.com/advisories/mooncake-through-0.3.13-post1-missing-authentication-in-http-metadata-server",
        "https://github.com/kvcache-ai/Mooncake/issues/4444",
        "https://github.com/kvcache-ai/Mooncake",
        "https://github.com/kvcache-ai/Mooncake/blob/719735896c86b56fabec6cf3e825fb2ea640597a/mooncake-wheel/mooncake/http_metadata_server.py#L61-L106"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-306"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103765.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-103765",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504747,
  "published_at": "2026-10-01T23:19:58.492+00:00"
}