CVE-2026-107227

{
  "etk_id": "ETK-2026-955",
  "cve_id": "CVE-2026-107227",
  "display_id": "CVE-2026-107227",
  "ghsa_id": "GHSA-x8v2-478q-2hvg",
  "euvd_id": "EUVD-2026-94588",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Unbounded WebSocket decompression in AsyncHttpClient",
  "summary": "AsyncHttpClient can allocate excessive memory while processing compressed WebSocket messages in affected 2.x and 3.x releases. A malicious or compromised WebSocket peer, or an on-path attacker for cleartext WebSocket traffic, can exhaust the JVM heap when WebSocket compression has been enabled.",
  "mitigation": "Upgrade to AsyncHttpClient 3.0.14 and configure an appropriate `webSocketMaxDecompressedFrameSize` for expected message sizes. Migrate from the unsupported 2.x line; until migration, disable WebSocket compression.",
  "vendor": "maven",
  "product": "maven:org.asynchttpclient:async-http-client",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 3.0.0, <= 3.0.13"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "3.0.14"
      ],
      "package_name": "org.asynchttpclient:async-http-client",
      "purl": "pkg:maven/org.asynchttpclient/async-http-client"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 2.2.0, <= 2.16.1"
      ],
      "ecosystem": "maven",
      "fixed_versions": [],
      "package_name": "org.asynchttpclient:async-http-client",
      "purl": "pkg:maven/org.asynchttpclient/async-http-client"
    }
  ],
  "cwes": [
    400
  ],
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss_score": 0.0043,
  "epss_percentile": 0.3631,
  "epss_asof": "2026-10-21",
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "mechanism_verified",
  "exploit": false,
  "pipeline_minutes": 18.569758083333333,
  "t0_at": "2026-10-07T20:51:04.823000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-12T02:03:45.400458+00:00",
      "days": 4.217136313171296,
      "is_lower_bound": false,
      "measured_at": "2026-10-07T20:51:04.823000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-07T20:51:04.823000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-07T20:51:04.823000+00:00",
      "url": "https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-x8v2-478q-2hvg"
    }
  }
}