{
 "id": "AIR-2026-0429",
 "slug": "cve-2026-56340-vllm-introduces-enhanced-protection-for-spars",
 "title": "CVE-2026-56340: vLLM introduces enhanced protection for sparse tensor validation DoS",
 "summary": "An incomplete previous fix left vLLM vulnerable to a denial of service attack via missing sparse tensor validation when prompt embeds are enabled. The project is implementing additional checks to validate tensor indices.",
 "type": "attack_on_ai",
 "categories": [
  "infra_vuln"
 ],
 "severity": 2,
 "targets": [
  "framework_or_tooling"
 ],
 "products": [
  "vLLM"
 ],
 "incident_date": "2026-01-08",
 "incident_date_precision": "day",
 "first_reported": "2026-01-08",
 "sources": [
  {
   "url": "https://github.com/advisories/GHSA-mcmc-2m55-j8jj",
   "publisher": "GitHub Advisory Database",
   "title": "CVE-2026-56340: vLLM introduced enhanced protection for CVE-2025-62164",
   "published_at": "2026-01-08"
  },
  {
   "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56340",
   "publisher": "NVD",
   "title": "CVE-2026-56340: vLLM versions >= 0.10.2 and < 0.13.0 are missing sparse tensor validation in multimodal embeddings processing.",
   "published_at": "2026-06-20"
  }
 ],
 "source_count": 2,
 "confidence": 0.9,
 "status": "published",
 "origin": "seed_ghsa",
 "tags": [
  "CVE-2026-56340",
  "dos",
  "vllm"
 ],
 "created_at": "2026-10-18T07:00:14.101Z",
 "updated_at": "2026-10-18T18:20:34.882Z"
}