{
  "cveId": "CVE-2026-65981",
  "url": "https://patchblox.com/security/cve/CVE-2026-65981",
  "summary": "CVE-2026-65981 is fixed in coturn on 1 platform by DEBIAN-CVE-2026-65981 (version 4.15.0-1), released August 1, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "coturn: Coturn is a free open source implementation of TURN and STUN Server",
  "description": "Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.15.0, a server using --mobility authenticates a resumed REFRESH request with the resuming user\u0027s credentials but does not verify that identity against the original allocation owner, allowing an authenticated attacker who obtains a victim MOBILITY-TICKET to receive and inject relayed traffic and consume the victim\u0027s quota. In the handle_turn_refresh resume branch, the victim allocation (orig_ss) is located solely by the attacker-controlled mobile id, and credentials are only adopted (via copy_auth_parameters) when the resuming session is unauthenticated. Because the attacker\u0027s session already has hmackey_set set to 1 from its own prior authentication (which is never reset for long-term-credential sessions), the credential copy is skipped and check_stun_auth validates the REFRESH against the attacker\u0027s own identity rather than the allocation owner\u0027s. This issue is fixed in version 4.15.0.",
  "published": "2026-07-31T21:17:31Z",
  "severity": "high",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L",
  "epss": 0.00389,
  "epssPercentile": 0.33238,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "coturn",
      "release": "Debian 14",
      "fixedVersion": "4.15.0-1",
      "fix": "DEBIAN-CVE-2026-65981",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-65981",
      "released": "2026-08-01T14:28:19Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}