{
  "cveId": "CVE-2026-68553",
  "url": "https://patchblox.com/security/cve/CVE-2026-68553",
  "summary": "CVE-2026-68553 is fixed in coturn on 1 platform by DEBIAN-CVE-2026-68553 (version 4.14.0-1), released August 21, 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 4.13.0, an authenticated TURN user can place printf-style format specifiers in the STUN USERNAME or REALM attribute, which passes is_secure_string() validation and is embedded into Redis keys at nine call sites in src/apps/relay/ns_ioalib_engine_impl.c. send_message_to_redis() in src/apps/relay/hiredis_libevent2.c then passes the attacker-controlled key as the format argument to redisAsyncCommand() while supplying only one variadic value, causing hiredis redisvFormatCommand() to read past the va_list. Exploitation can crash the coturn process and terminate active TURN sessions or disclose stack memory into Redis. This issue is fixed in version 4.13.0.",
  "published": "2026-08-19T21:17:28Z",
  "severity": "high",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H",
  "epss": 0.0048,
  "epssPercentile": 0.41668,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "coturn",
      "release": "Debian 14",
      "fixedVersion": "4.14.0-1",
      "fix": "DEBIAN-CVE-2026-68553",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-68553",
      "released": "2026-08-21T23:37:15Z"
    }
  ],
  "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"
  }
}