{
 "id": "AIR-2026-0258",
 "slug": "cve-2026-103435-time-of-check-to-time-of-use-vulnerability-i",
 "title": "CVE-2026-103435: Time-of-check to time-of-use vulnerability in Claude Code sandbox",
 "summary": "A TOCTOU gap in Claude Code permits attackers with workspace write access to use symlinks for writing output outside the project sandbox. Exploitation requires winning a race condition against the file write.",
 "type": "attack_on_ai",
 "categories": [
  "infra_vuln"
 ],
 "severity": 2,
 "targets": [
  "Anthropic",
  "framework_or_tooling"
 ],
 "products": [
  "Claude Code"
 ],
 "incident_date": "2026-10-07",
 "incident_date_precision": "day",
 "first_reported": "2026-10-07",
 "sources": [
  {
   "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-103435",
   "publisher": "NVD",
   "title": "CVE-2026-103435: Claude Code validated that a target file path resided within the project working directory at permission-check time, but…",
   "published_at": "2026-10-07"
  }
 ],
 "source_count": 1,
 "confidence": 0.95,
 "status": "published",
 "origin": "seed_nvd",
 "tags": [
  "CVE-2026-103435",
  "toctou",
  "symlink"
 ],
 "created_at": "2026-10-18T06:33:31.967Z",
 "updated_at": "2026-10-18T06:33:31.967Z"
}