{
 "id": "AIR-2026-0867",
 "slug": "cve-2026-59220-open-webui-redos-in-skill-mention-regexes-cau",
 "title": "CVE-2026-59220: Open WebUI ReDoS in skill-mention regexes causes DoS",
 "summary": "Inefficient regular expressions in Open WebUI middleware allow authenticated users to trigger catastrophic backtracking. This locks up single-worker instances and causes a denial of service.",
 "type": "attack_on_ai",
 "categories": [
  "infra_vuln"
 ],
 "severity": 2,
 "targets": [
  "framework_or_tooling"
 ],
 "products": [
  "Open WebUI"
 ],
 "incident_date": "2026-07-24",
 "incident_date_precision": "day",
 "first_reported": "2026-07-09",
 "sources": [
  {
   "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59220",
   "publisher": "NVD",
   "title": "CVE-2026-59220: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform.",
   "published_at": "2026-07-09"
  },
  {
   "url": "https://github.com/advisories/GHSA-ffpj-xv5c-p3gw",
   "publisher": "GitHub Advisory Database",
   "title": "CVE-2026-59220: Open WebUI: ReDoS in skill-mention regexes causes whole-instance DoS on default config",
   "published_at": "2026-07-24"
  }
 ],
 "source_count": 2,
 "confidence": 0.95,
 "status": "published",
 "origin": "seed_ghsa",
 "tags": [
  "CVE-2026-59220",
  "redos",
  "denial-of-service"
 ],
 "created_at": "2026-10-18T07:00:14.101Z",
 "updated_at": "2026-10-18T10:04:21.885Z"
}