{"id":"GHSA-27mf-ghqm-j3j8","summary":"aiohttp has a memory leak when middleware is enabled when requesting a resource with a non-allowed method","details":"### Summary\n\nA memory leak can occur when a request produces a `MatchInfoError`. This was caused by adding an entry to a cache on each request, due to the building of each `MatchInfoError` producing a unique cache entry.\n\n### Impact\n\nIf the user is making use of any middlewares with `aiohttp.web` then it is advisable to upgrade immediately.\n\nAn attacker may be able to exhaust the memory resources of a server by sending a substantial number (100,000s to millions) of such requests.\n\n-----\n\nPatch: https://github.com/aio-libs/aiohttp/commit/bc15db61615079d1b6327ba42c682f758fa96936","aliases":["CVE-2024-52303"],"modified":"2026-02-04T02:52:02.539818Z","published":"2024-11-18T21:02:17Z","related":["CGA-v257-cqc3-wrvf"],"database_specific":{"github_reviewed_at":"2024-11-18T21:02:17Z","severity":"MODERATE","nvd_published_at":"2024-11-18T20:15:06Z","cwe_ids":["CWE-772"],"github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-27mf-ghqm-j3j8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-52303"},{"type":"WEB","url":"https://github.com/aio-libs/aiohttp/commit/bc15db61615079d1b6327ba42c682f758fa96936"},{"type":"PACKAGE","url":"https://github.com/aio-libs/aiohttp"}],"affected":[{"package":{"name":"aiohttp","ecosystem":"PyPI","purl":"pkg:pypi/aiohttp"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.10.6"},{"fixed":"3.10.11"}]}],"versions":["3.10.10","3.10.11rc0","3.10.6","3.10.7","3.10.8","3.10.9"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/11/GHSA-27mf-ghqm-j3j8/GHSA-27mf-ghqm-j3j8.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"}]}