{"id":"CVE-2026-54279","aliases":["GHSA-2fqr-mr3j-6wp8","PYSEC-2026-2112"],"url":"https://o3.security/vulnerability/CVE-2026-54279","summary":"AIOHTTP: Host-Only Cookies Become Domain Cookies After CookieJar Persistence","details":"AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, host-only cookies that are saved with CookieJar.save() and then restored later with CookieJar.load() lose their host-only status. This vulnerability is fixed in 3.14.1.","published":"2026-06-22T16:32:45.407Z","modified":"2026-08-07T11:51:26.516025756Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"aiohttp","fixedVersion":"3.14.1"}],"fix":{"url":"https://github.com/aio-libs/aiohttp/commit/a329a7aacad5284f087af36103aff778746da0f2","label":"aio-libs/aiohttp@a329a7a"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54279.json"},{"type":"ADVISORY","url":"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-2fqr-mr3j-6wp8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54279"},{"type":"FIX","url":"https://github.com/aio-libs/aiohttp/commit/a329a7aacad5284f087af36103aff778746da0f2"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:51:26.516025756Z"}}