{
 "public_id": "AIR-2026-0154",
 "incident_id": "2026-07-skillcloak-scanner-evasion",
 "date_disclosed": "2026-07-06",
 "date_occurred": null,
 "title": "SkillCloak: self-extracting skill packing evades 8 agent-skill scanners at >90%",
 "class": "research_demo",
 "attack_surface": "skill_plugin",
 "initial_vector": "packed_payload_restored_at_runtime",
 "agent_capability_abused": [
  "shell_execution",
  "runtime_unpacking"
 ],
 "target_product": "Claude Code, OpenAI Codex, OpenClaw skill loading; eight skill scanners including Cisco's",
 "target_vendor": "Anthropic / OpenAI / OpenClaw / Cisco",
 "autonomy_level": "semi_autonomous",
 "impact_realized": false,
 "impact_type": [
  "arbitrary_code_execution"
 ],
 "blast_radius": "static skill scanning as a control class",
 "cve": [],
 "taxonomy": {
  "owasp_asi": [
   "ASI05"
  ],
  "mitre_atlas": [],
  "labels": [
   "scanner_evasion",
   "homoglyph_substitution",
   "self_extracting_packing",
   "time_of_check_time_of_use"
  ]
 },
 "defense_present": "eight static agent-skill scanners",
 "defense_bypassed": true,
 "fix_shipped": "academic disclosure; dynamic detection proposed",
 "primary_sources": [
  "https://thehackernews.com/2026/07/new-skillcloak-technique-lets-malicious.html",
  "https://arxiv.org/html/2607.02357"
 ],
 "verified_quote": "A scanner judges a skill by how it looks when it is submitted, but the malicious behavior only shows up once the skill runs, after the scan has passed.",
 "confidence": "high",
 "notes": "Research from Hong Kong University of Science and Technology. Two operators: self-extracting packing (>90% bypass on all 8 scanners, >99% on most) and lighter character rewriting - homoglyph swaps and splitting flagged commands across newlines (>80% on most, 96% on one). arXiv preprint 2607.02357 'Cloak and Detonate' listed as the paper; only the news writeup is quoted here.",
 "risk_category": "security_fraud",
 "risk_secondary": [],
 "risk_subcategory": "Remote Code Execution & Sandbox Escape",
 "risk_sub_secondary": [],
 "ai_entity": "generative",
 "agency": "agent_acted",
 "agency_debatable": true,
 "agency_reason": "the packed skill unpacks and executes under the agent at runtime",
 "vector_family": "other",
 "vector_detail": "packed_payload_restored_at_runtime",
 "guardrail_kind": [
  "unknown"
 ],
 "guardrail_outcome": "silent",
 "xrefs": {
  "aiid": [],
  "atlas": [],
  "cve": [],
  "ghsa": []
 },
 "primary_asi": "ASI05",
 "agent_framework": "unknown",
 "model_provider": "multiple",
 "model_name": "",
 "detection_mechanism": "external_researcher",
 "tool_access": "unknown",
 "financial_loss_band": "unknown",
 "eai_category": "privilege_escalation",
 "eai_domain": "access_control_and_permissions",
 "eai_secondary": [],
 "eai_reason": "subcategory: Remote Code Execution & Sandbox Escape",
 "asi_curated": [
  "ASI05"
 ],
 "asi_scope": "in_scope",
 "asi_provenance": "curated",
 "asi_reason": "curated: ASI05",
 "submitted_by": "EAI Internal"
}