{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.14.0"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "aiohttp"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.14.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54279"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-665"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-15T20:08:51Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "### Summary\n\nHost-only cookies that are saved with ``CookieJar.save()`` and then restored later with ``CookieJar.load()`` lose their host-only status.\n\n### Impact\n\nHost-only cookies that have been loaded from disk may get sent to subdomains that previously should have been disallowed.\n\n-----\n\nPatch: https://github.com/aio-libs/aiohttp/commit/a329a7aacad5284f087af36103aff778746da0f2",
  "id": "GHSA-2fqr-mr3j-6wp8",
  "modified": "2026-06-15T20:08:51Z",
  "published": "2026-06-15T20:08:51Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-2fqr-mr3j-6wp8"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/aio-libs/aiohttp"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    }
  ],
  "summary": "aiohttp: Host-Only Cookies Become Domain Cookies After CookieJar Persistence"
}