{
 "id": "AIR-2026-0188",
 "slug": "cve-2026-77258-arbitrary-file-upload-flaw-in-mcp-atlassian",
 "title": "CVE-2026-77258: Arbitrary file upload flaw in MCP Atlassian",
 "summary": "The MCP Atlassian server before version 0.22.0 failed to restrict attachment paths, permitting arbitrary file uploads and local data disclosure. A patch was issued in version 0.22.0.",
 "type": "attack_on_ai",
 "categories": [
  "infra_vuln"
 ],
 "severity": 2,
 "targets": [
  "framework_or_tooling"
 ],
 "products": [
  "MCP Atlassian"
 ],
 "incident_date": "2026-09-22",
 "incident_date_precision": "day",
 "first_reported": "2026-09-22",
 "sources": [
  {
   "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77258",
   "publisher": "NVD",
   "title": "CVE-2026-77258: MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira).",
   "published_at": "2026-09-22"
  }
 ],
 "source_count": 1,
 "confidence": 0.95,
 "status": "published",
 "origin": "seed_nvd",
 "tags": [
  "CVE-2026-77258",
  "arbitrary-file-upload",
  "mcp"
 ],
 "created_at": "2026-10-18T06:33:31.967Z",
 "updated_at": "2026-10-18T06:33:31.967Z"
}