{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "8.16.0"
              },
              {
                "fixed": "8.21.0"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "11b991232fbcaa88e2b1faecac224416b0001e35"
            },
            {
              "fixed": "68720b4837284335b2d63cb358f8f6ce65f5bc55"
            }
          ],
          "repo": "https://github.com/curl/curl",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "curl",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11586.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "8.20.0"
          },
          {
            "last_affected": "8.20.0"
          },
          {
            "introduced": "8.19.0"
          },
          {
            "last_affected": "8.19.0"
          },
          {
            "introduced": "8.18.0"
          },
          {
            "last_affected": "8.18.0"
          },
          {
            "introduced": "8.17.0"
          },
          {
            "last_affected": "8.17.0"
          },
          {
            "introduced": "8.16.0"
          },
          {
            "last_affected": "8.16.0"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "By default, curl automatically responds to WebSocket PING frames. Because curl\nlacks an upper bound on memory allocation for unacknowledged frames, a\nmalicious server can exhaust all available memory by flooding curl with rapid,\nsequential PING messages.",
  "id": "CVE-2026-11586",
  "modified": "2026-07-09T03:51:39.894637220Z",
  "published": "2026-07-03T06:13:04.448Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2026-11586.html"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2026-11586.json"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/3788931"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11586.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-11586"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "WS Auto-PONG memory exhaustion"
}