{
 "id": "AIR-2026-0151",
 "slug": "cve-2026-93840-validation-flaw-in-vllm-allowed-token-ids-han",
 "title": "CVE-2026-93840: Validation flaw in vLLM allowed_token_ids handling",
 "summary": "vLLM before 0.29.0 improperly validates allowed token IDs against tokenizer length instead of output logits width. Attackers can supply out-of-vocabulary tokens that corrupt GPU logits state and affect concurrent requests.",
 "type": "attack_on_ai",
 "categories": [
  "infra_vuln"
 ],
 "severity": 2,
 "targets": [
  "framework_or_tooling"
 ],
 "products": [
  "vLLM"
 ],
 "incident_date": "2026-09-18",
 "incident_date_precision": "day",
 "first_reported": "2026-09-18",
 "sources": [
  {
   "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93840",
   "publisher": "NVD",
   "title": "CVE-2026-93840: vLLM before 0.29.0 validates allowed_token_ids against tokenizer length instead of model output logits width in…",
   "published_at": "2026-09-18"
  }
 ],
 "source_count": 1,
 "confidence": 0.95,
 "status": "published",
 "origin": "seed_nvd",
 "tags": [
  "CVE-2026-93840",
  "input-validation",
  "vllm"
 ],
 "created_at": "2026-10-18T06:33:31.967Z",
 "updated_at": "2026-10-18T06:33:31.967Z"
}