{
  "cveId": "CVE-2026-42859",
  "url": "https://patchblox.com/security/cve/CVE-2026-42859",
  "summary": "CVE-2026-42859 is fixed in neatvnc on 1 platform by DEBIAN-CVE-2026-42859 (version 0.9.1\u002Bdfsg-1.1), released May 11, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "neatvnc: Neat VNC is a VNC server library",
  "description": "Neat VNC is a VNC server library. Prior to 0.9.6, a pre-authentication stack buffer overflow exists in neatvnc in the RSA-AES security type handler. An unauthenticated remote attacker who can reach the VNC listening socket can send a crafted security type 5 (RSA-AES) or security type 129 (RSA-AES-256) handshake with an oversized client RSA public key, causing rsa_aes_send_challenge in src/auth/rsa-aes.c to overflow a 1024-byte on-stack buffer when encrypting the server challenge. This results in at least a denial of service via server crash. This vulnerability is fixed in 0.9.6.",
  "published": "2026-05-11T18:16:36Z",
  "severity": "",
  "epss": 0.00631,
  "epssPercentile": 0.50492,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "neatvnc",
      "release": "Debian 14",
      "fixedVersion": "0.9.1\u002Bdfsg-1.1",
      "fix": "DEBIAN-CVE-2026-42859",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-42859",
      "released": "2026-05-11T18:16:36Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}