WebSocket endless loop

{
  "id": "b4f403beb4b295e36df5c0b34485ac17b11c1a12888a708aa8945165cf7df5de",
  "url": "https://osv.dev/vulnerability/CVE-2025-5399",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "WebSocket endless loop",
    "summary": "Due to a mistake in libcurl's WebSocket code, a malicious server can send a particularly crafted packet which makes libcurl get trapped in an endless busy-loop. There is no other way for the application to escape or exit this loop other than killing the thread/process. This might be used to DoS libcurl-using application.",
    "evidence": "osv:CVE-2025-5399",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-5399",
      "aliases": [
        "CURL-CVE-2025-5399",
        "CVE-2025-5399"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/curl/curl",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1c3149881769e7bd79b072e48374e4c2b3678b2f"
                },
                {
                  "fixed": "fdb8a789d2b446b77bd7cdd2eff95f6cbc814cf4"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "8.13.0"
                      },
                      {
                        "fixed": "8.14.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "curl-8_14_0",
            "curl-8_13_0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-5399.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:21.104053946Z",
      "provider": "osv",
      "references": [
        "https://curl.se/docs/CVE-2025-5399.html",
        "https://curl.se/docs/CVE-2025-5399.json",
        "https://hackerone.com/reports/3168039",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/5xxx/CVE-2025-5399.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-5399"
      ],
      "provider_metadata": {
        "cna_assigner": "curl",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "8.14.0"
                  },
                  {
                    "last_affected": "8.14.0"
                  },
                  {
                    "introduced": "8.13.0"
                  },
                  {
                    "last_affected": "8.13.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandaloneSingleVersion"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/5xxx/CVE-2025-5399.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-5399",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 487394,
  "published_at": "2025-06-07T07:49:09.37+00:00"
}