{
  "cveId": "CVE-2026-83813",
  "url": "https://patchblox.com/security/cve/CVE-2026-83813",
  "summary": "CVE-2026-83813 is fixed in twisted on 1 platform by DEBIAN-CVE-2026-83813 (version 26.10.0-1), released November 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Twisted: DNS Response Spoofing in twisted.names Due to Missing Source Address Validation",
  "description": "Twisted is an event-based framework for internet applications, supporting Python 3.6\u002B. Prior to 26.10.0rc1, twisted.names.dns.DNSDatagramProtocol accepts a UDP DNS response for a pending query when its 16-bit transaction ID matches but does not verify that the response came from the queried host and port. An attacker able to deliver a packet to the resolver\u0027s listening port with the correct transaction ID can inject a forged answer. The standard twisted.names.client.Resolver uses a new random source port for each query, increasing off-path attack complexity, while applications that reuse a DNSDatagramProtocol instance expose only the transaction-ID search space after the first query. A successful forgery can redirect hostname resolution and enable mail interception, server-side request forgery, or man-in-the-middle positioning. This issue is fixed in version 26.10.0rc1.",
  "published": "2026-10-23T21:17:25Z",
  "severity": "Low",
  "cvss": 3.1,
  "cvssVector": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
  "cwe": "Origin Validation Error",
  "epss": 0.00114,
  "epssPercentile": 0.0152,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83813",
  "fixes": [
    {
      "platform": "linux",
      "product": "twisted",
      "release": "Debian 14",
      "fixedVersion": "26.10.0-1",
      "fix": "DEBIAN-CVE-2026-83813",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-83813",
      "released": "2026-11-03T18:58:21Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T19:38:12Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}