TC-2026-0048 · NPM · MCP

@iflow-mcp/[email protected]

Second GlassWorm cluster MCP server using invisible Unicode Variation Selectors (U+FE00..U+FE0F) to conceal an eval() loader inside a cloned Firecrawl MCP wrapper.

Primary advisory (Koi Security) Back to all 66 records

Signed ledger verdict

TC-2026-0048
Known bad (exit 2) npm:@iflow-mcp/[email protected]

IOC & scope: npm:@iflow-mcp/[email protected] (GlassWorm cluster). Verified by human review and signed into the CC-BY 4.0 OSV v1.6.0 feed.

Credited finder
Koi Security ↗
Recorded timestamp
2026-03-20
Canonical SHA-256
c36f39e88e14d299…
Local hook action
Block (exit 2)
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: ~/.cursor/mcp.json, ~/.claude.json
  2. 2. Environment
    Variables harvested: FIRECRAWL_API_KEY, OPENAI_API_KEY
  3. 3. Network
    Outbound egress domains: api.mainnet-beta.solana.com:443
  4. 4. Subprocess
    Process execution primitives: eval(Buffer.from(...))
  5. 5. Lifecycle
    Install / startup hooks: None observed
  6. 6. OAuth / MCP
    Declared scopes: None observed
  7. 7. Obfuscation
    Encoding / steganography: unicode_variation_selectors_fe00_fe0f
  8. 8. Provenance
    Attestation status: glassworm_actor_iflow_mcp

Governance & detector mapping

  1. OWASP Agentic ASI (2026): ASI02 (Tool Misuse & Exploitation), ASI04 (Agentic Supply Chain Vulnerabilities), ASI05 (Unexpected Code Execution (RCE))
  2. OWASP Agentic AST (2026): AST01 (Malicious MCP Servers), AST04 (Covert Channel Exfiltration)
  3. Deterministic rules matched: RULE_01_GLASSWORM_UNICODE, RULE_05_PROMPT_EXFIL_SHELL

Version scoping & related records

  • No other versions of this package are currently listed on the board. Unlisted versions evaluate to unknown under local policy.yml.

Local CLI verification

$ threat-cafe-hook check "npm:@iflow-mcp/[email protected]"
[threat.cafe] known_bad: npm:@iflow-mcp/[email protected] (TC-2026-0048)
  Reason: Second GlassWorm cluster MCP server using invisible Unicode Variation Selectors (U+FE00..U
  Source: https://thehackernews.com/2026/03/glassworm-malware-uses-solana-dead.html (credited to Koi Security)

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-2026-0048",
  "modified": "2026-03-20T09:10:00Z",
  "published": "2026-03-20T09:10:00Z",
  "summary": "Second GlassWorm cluster MCP server using invisible Unicode Variation Selectors (U+FE00..U+FE0F) to conceal an eval() loader inside a cloned Firecrawl MCP wrapper.",
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@iflow-mcp/firecrawl-mcp-server"
      },
      "versions": [
        "1.0.8"
      ]
    }
  ],
  "credits": [
    {
      "name": "Koi Security",
      "type": "FINDER"
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://thehackernews.com/2026/03/glassworm-malware-uses-solana-dead.html"
    },
    {
      "type": "WEB",
      "url": "https://threat.cafe/incidents/tc-2026-0048/"
    }
  ],
  "database_specific": {
    "target": "npm:@iflow-mcp/[email protected]",
    "kind": "mcp",
    "verdict": "known_bad",
    "ioc": "npm:@iflow-mcp/[email protected] (GlassWorm cluster)",
    "artifact_sha256": "c36f39e88e14d299834ad29f69702bac406395a6a9e05cf2a66c71a9343931d6",
    "owasp_asi": [
      "ASI02",
      "ASI04",
      "ASI05"
    ],
    "owasp_ast": [
      "AST01",
      "AST04"
    ],
    "rules_matched": [
      "RULE_01_GLASSWORM_UNICODE",
      "RULE_05_PROMPT_EXFIL_SHELL"
    ],
    "abom": {
      "fs_sensitive": [
        "~/.cursor/mcp.json",
        "~/.claude.json"
      ],
      "env_harvest": [
        "FIRECRAWL_API_KEY",
        "OPENAI_API_KEY"
      ],
      "net_egress": [
        "api.mainnet-beta.solana.com:443"
      ],
      "proc_exec": [
        "eval(Buffer.from(...))"
      ],
      "install_hooks": [],
      "oauth_scopes": [],
      "obfuscation": [
        "unicode_variation_selectors_fe00_fe0f"
      ],
      "provenance": "glassworm_actor_iflow_mcp"
    },
    "license": "CC-BY-4.0",
    "record_digest": "sha256:c82b8a5f1f59fed77c8b32085004a851156b0f89a78081a03990e03519be413c",
    "release_signature_url": "https://threat.cafe/feed.json.sig"
  }
}

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