CVE-2026-128126

{
  "etk_id": "ETK-2026-4427",
  "cve_id": "CVE-2026-128126",
  "display_id": "CVE-2026-128126",
  "ghsa_id": "GHSA-xgw8-8ccx-rmqh",
  "euvd_id": "EUVD-2026-125758",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Algorithmic denial of service in aiohttp form parsing",
  "summary": "aiohttp versions before 3.14.4 are affected when an application calls Request.post() for URL-encoded POST data. A remote client can submit many duplicate form parameters to consume event-loop time and disrupt request processing, provided the request is accepted by client_max_size.",
  "mitigation": "Upgrade aiohttp to version 3.14.4 or later. Until upgraded, restrict exposure of handlers that parse URL-encoded form submissions and enforce conservative request limits.",
  "vendor": "aio-libs",
  "product": "aiohttp",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 3.14.3"
      ],
      "ecosystem": "pip",
      "fixed_versions": [
        "3.14.4"
      ],
      "package_name": "aiohttp",
      "purl": "pkg:pypi/aiohttp"
    }
  ],
  "cwes": [
    407
  ],
  "cvss_score": 8.7,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 13.76601965,
  "t0_at": "2026-11-13T20:27:57.071000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-11-13T20:27:57.071000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-13T20:27:57.071000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-128126"
    }
  }
}