{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "4.15.0"
              },
              {
                "fixed": "4.16.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "ac6a9633b16a1a35ab248570484e52d138515ad5"
            },
            {
              "fixed": "a97f1924bb435bec49d6d91ae01fa2487c2e1bf7"
            },
            {
              "fixed": "ef409b4227ca16bdd23b3e3eba38530292c20773"
            }
          ],
          "repo": "https://github.com/coturn/coturn",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-hpq3-g7x4-h7xx"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68555.json"
  },
  "details": "Coturn is a free open source implementation of TURN and STUN Server. In 4.15.0, an authenticated TURN user can repeatedly resume one allocation from fresh UDP 5-tuples without completing a handoff when the server enables --mobility. mobile_begin_transition() in src/server/ns_turn_server.c disarms each new session's allocation timeout and overwrites the allocation's single mobile_pending_resume link, leaving earlier pending sessions unreachable by the cleanup path, while copy_auth_parameters() ignores inc_quota() failure. The attacker can therefore retain unbounded server-side sessions and exhaust process memory even when --user-quota=1 is configured. This issue is fixed in version 4.16.0.",
  "id": "CVE-2026-68555",
  "modified": "2026-08-23T03:42:34.147009241Z",
  "published": "2026-08-19T20:43:11.038Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/coturn/coturn/releases/tag/4.16.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68555.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/coturn/coturn/security/advisories/GHSA-hpq3-g7x4-h7xx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68555"
    },
    {
      "type": "FIX",
      "url": "https://github.com/coturn/coturn/commit/a97f1924bb435bec49d6d91ae01fa2487c2e1bf7"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "coturn: Chained mobility resumes allow authenticated remote memory exhaustion"
}