TC-2026-0109 · NPM · MCP

@mcpjam/[email protected]

Patched release of MCPJam Inspector binding strictly to 127.0.0.1 with mandatory bearer token authentication.

Primary advisory (threat.cafe Baseline Audit) Back to all 66 records

Signed ledger verdict

TC-2026-0109
No known bad (exit 0) npm:@mcpjam/[email protected]

IOC & scope: npm:@mcpjam/[email protected] (patched for CVE-2026-23744). Verified by human review and signed into the CC-BY 4.0 OSV v1.6.0 feed.

Credited finder
threat.cafe Baseline Audit ↗
Recorded timestamp
2026-04-12
Canonical SHA-256
1ea9fdcd5b430c7e…
Local hook action
Proceed & log (exit 0)
Run live in Counter Workbench

Signed in /feed.json (.sig).

01 8-Vector Capability X-Ray (ABOM) & OWASP Agentic Crosswalk

Deterministic capability profile and taxonomy mapping.

Every artifact in the threat.cafe ledger is profiled across eight execution vectors and mapped to the OWASP Top 10 for Agentic Applications (ASI01-ASI10) and Agentic Skills & Tools (AST01-AST10).

8-Vector Capability X-Ray (ABOM)

  1. 1. Filesystem
    Sensitive paths touched: None observed
  2. 2. Environment
    Variables harvested: None observed
  3. 3. Network
    Outbound egress domains: 127.0.0.1:6274 (authenticated loopback only)
  4. 4. Subprocess
    Process execution primitives: None observed
  5. 5. Lifecycle
    Install / startup hooks: None observed
  6. 6. OAuth / MCP
    Declared scopes: None observed
  7. 7. Obfuscation
    Encoding / steganography: None observed
  8. 8. Provenance
    Attestation status: verified_patched_release

Governance & detector mapping

  1. OWASP Agentic ASI (2026): None triggered (baseline control)
  2. OWASP Agentic AST (2026): None triggered (baseline control)
  3. Deterministic rules matched: Clean baseline control (0 static rules triggered)

Version scoping & related records

Local CLI verification

$ threat-cafe-hook check "npm:@mcpjam/[email protected]"
[threat.cafe] no_known_bad: npm:@mcpjam/[email protected] (TC-2026-0109)
  Reason: Patched release of MCPJam Inspector binding strictly to 127.0.0.1 with mandatory bearer to
  Source: https://nvd.nist.gov/vuln/detail/CVE-2026-23744 (credited to threat.cafe Baseline Audit)

OSV v1.6.0 machine-readable record

Included in /feed.json under CC-BY 4.0 license and verified by /feed.json.sig.

{
  "schema_version": "1.6.0",
  "id": "TC-2026-0109",
  "modified": "2026-04-12T09:00:00Z",
  "published": "2026-04-12T09:00:00Z",
  "summary": "Patched release of MCPJam Inspector binding strictly to 127.0.0.1 with mandatory bearer token authentication.",
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@mcpjam/inspector"
      },
      "versions": [
        "0.4.3"
      ]
    }
  ],
  "credits": [
    {
      "name": "threat.cafe Baseline Audit",
      "type": "FINDER"
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23744"
    },
    {
      "type": "WEB",
      "url": "https://threat.cafe/incidents/tc-2026-0109/"
    }
  ],
  "database_specific": {
    "target": "npm:@mcpjam/[email protected]",
    "kind": "mcp",
    "verdict": "no_known_bad",
    "ioc": "npm:@mcpjam/[email protected] (patched for CVE-2026-23744)",
    "artifact_sha256": "1ea9fdcd5b430c7effdcc0266bfd7a98bd152c804a8634e33d21727703fade1d",
    "owasp_asi": [],
    "owasp_ast": [],
    "rules_matched": [],
    "abom": {
      "fs_sensitive": [],
      "env_harvest": [],
      "net_egress": [
        "127.0.0.1:6274 (authenticated loopback only)"
      ],
      "proc_exec": [],
      "install_hooks": [],
      "oauth_scopes": [],
      "obfuscation": [],
      "provenance": "verified_patched_release"
    },
    "license": "CC-BY-4.0",
    "record_digest": "sha256:e75ec48ef8f5db19ce6974640eb77d065ae5025732421c5057c14ddeb0ce56b9",
    "release_signature_url": "https://threat.cafe/feed.json.sig"
  }
}

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