{
  "cveId": "CVE-2026-73261",
  "url": "https://patchblox.com/security/cve/CVE-2026-73261",
  "summary": "CVE-2026-73261 is fixed in mongoose on 1 platform by DEBIAN-CVE-2026-73261 (version 7.23\u002Bds-1), released August 19, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "mongoose: Mongoose is an embedded web server and network library",
  "description": "Mongoose is an embedded web server and network library. Prior to 7.23, the built-in TCP/IP stack enabled by MG_ENABLE_TCPIP in src/net_builtin.c does not reject a TCP option whose declared opts[1] length exceeds the remaining option bytes. In handle_opt(), a NOP followed by a truncated MSS option causes opts[3] to be read outside the declared options area and used as the low byte of dmss. An unauthenticated remote peer can corrupt the per-connection MSS value so later mg_send() calls transmit truncated or zero-length application payloads while the TCP connection otherwise appears healthy. This issue is fixed in version 7.23.",
  "published": "2026-10-14T19:17:19Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00417,
  "epssPercentile": 0.36293,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "mongoose",
      "release": "Debian 14",
      "fixedVersion": "7.23\u002Bds-1",
      "fix": "DEBIAN-CVE-2026-73261",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-73261",
      "released": "2026-08-19T23:17:07Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}