{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "3.0.0"
              },
              {
                "fixed": "3.0.12"
              },
              {
                "introduced": "2.0.0"
              },
              {
                "fixed": "2.16.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "9a771c7b40e716ca77a3cad691545b29ff64bfd3"
            },
            {
              "introduced": "b60e5a0d7d989e4a24c13e03ba786c375b727448"
            },
            {
              "fixed": "c07038b44e5206375662b46859672e8f1df9f05a"
            },
            {
              "fixed": "d1f0ccec417092098d40242fee7dfac84bb3c21f"
            },
            {
              "fixed": "75a278550aa9a980009d022fb4e635f9c8738c03"
            },
            {
              "fixed": "ccdcaa627db6d96dcc42105212cb3ba5048bd7f9"
            }
          ],
          "repo": "https://github.com/asynchttpclient/async-http-client",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-rwhr-j9rv-85f8"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-345",
      "CWE-670"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107284.json"
  },
  "details": "The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.12 and 2.16.1, WebSocketHandler.upgrade aborts a handshake whose Sec-WebSocket-Accept value is missing or invalid but continues into pipeline installation and onOpen delivery. Frames coalesced with the invalid 101 response can be decoded and delivered from a peer that did not prove the handshake, although the request future fails and the channel closes. This issue is fixed in versions 3.0.12 and 2.16.1.",
  "id": "CVE-2026-107284",
  "modified": "2026-10-09T02:31:02.133177089Z",
  "published": "2026-10-07T21:27:03.257Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.16.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.12"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-rwhr-j9rv-85f8"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107284.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-107284"
    },
    {
      "type": "FIX",
      "url": "https://github.com/AsyncHttpClient/async-http-client/commit/75a278550aa9a980009d022fb4e635f9c8738c03"
    },
    {
      "type": "FIX",
      "url": "https://github.com/AsyncHttpClient/async-http-client/commit/ccdcaa627db6d96dcc42105212cb3ba5048bd7f9"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "AsyncHttpClient: WebSocket handshake continues after a failed Sec-WebSocket-Accept check"
}