TC-2026-0047 · PYPI · MCP

[email protected]

Slopsquatted PyPI package registered to match a hallucinated MCP package name frequently recommended by coding LLMs; steals PGPASSWORD and DATABASE_URL on import.

Primary advisory (Socket Security) Back to all 66 records

Signed ledger verdict

TC-2026-0047
Known bad (exit 2) pypi:mcp-server-postgres-plus==0.2.1

IOC & scope: pypi:mcp-server-postgres-plus==0.2.1 (Slopsquatting LLM Hallucination Package). Verified by human review and signed into the CC-BY 4.0 OSV v1.6.0 feed.

Credited finder
Socket Security ↗
Recorded timestamp
2026-04-09
Canonical SHA-256
ac1df61612eea458…
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: None observed
  2. 2. Environment
    Variables harvested: DATABASE_URL, PGPASSWORD, POSTGRES_CONNECTION_STRING
  3. 3. Network
    Outbound egress domains: pg-metrics-collector.invalid:443
  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: llm_hallucination_slopsquat

Governance & detector mapping

  1. OWASP Agentic ASI (2026): ASI03 (Identity & Privilege Abuse), ASI04 (Agentic Supply Chain Vulnerabilities)
  2. OWASP Agentic AST (2026): AST01 (Malicious MCP Servers), AST06 (Unverified Third-Party Skills)
  3. Deterministic rules matched: RULE_05_PROMPT_EXFIL_SHELL, RULE_06_RELEASE_AGE_GATE

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 "pypi:mcp-server-postgres-plus==0.2.1"
[threat.cafe] known_bad: pypi:mcp-server-postgres-plus==0.2.1 (TC-2026-0047)
  Reason: Slopsquatted PyPI package registered to match a hallucinated MCP package name frequently r
  Source: https://socket.dev/blog (credited to Socket 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-2026-0047",
  "modified": "2026-04-09T14:20:00Z",
  "published": "2026-04-09T14:20:00Z",
  "summary": "Slopsquatted PyPI package registered to match a hallucinated MCP package name frequently recommended by coding LLMs; steals PGPASSWORD and DATABASE_URL on import.",
  "affected": [
    {
      "package": {
        "ecosystem": "pypi",
        "name": "mcp-server-postgres-plus"
      },
      "versions": [
        "0.2.1"
      ]
    }
  ],
  "credits": [
    {
      "name": "Socket Security",
      "type": "FINDER"
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://socket.dev/blog"
    },
    {
      "type": "WEB",
      "url": "https://threat.cafe/incidents/tc-2026-0047/"
    }
  ],
  "database_specific": {
    "target": "pypi:mcp-server-postgres-plus==0.2.1",
    "kind": "mcp",
    "verdict": "known_bad",
    "ioc": "pypi:mcp-server-postgres-plus==0.2.1 (Slopsquatting LLM Hallucination Package)",
    "artifact_sha256": "ac1df61612eea458c3e5b208ffff35d682ccaf121d4dfff26cd146f364feb794",
    "owasp_asi": [
      "ASI03",
      "ASI04"
    ],
    "owasp_ast": [
      "AST01",
      "AST06"
    ],
    "rules_matched": [
      "RULE_05_PROMPT_EXFIL_SHELL",
      "RULE_06_RELEASE_AGE_GATE"
    ],
    "abom": {
      "fs_sensitive": [],
      "env_harvest": [
        "DATABASE_URL",
        "PGPASSWORD",
        "POSTGRES_CONNECTION_STRING"
      ],
      "net_egress": [
        "pg-metrics-collector.invalid:443"
      ],
      "proc_exec": [],
      "install_hooks": [],
      "oauth_scopes": [],
      "obfuscation": [],
      "provenance": "llm_hallucination_slopsquat"
    },
    "license": "CC-BY-4.0",
    "record_digest": "sha256:285789b2fd7eea8340e34d3ef03b4eb7bf0a0142d10260995825624984b6de35",
    "release_signature_url": "https://threat.cafe/feed.json.sig"
  }
}

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