{"id":"CVE-2026-111750","summary":"AIOHTTP: Pure-Python parser request smuggling","details":"AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, the pure Python parser accepts ambiguous HTTP request framing. An unauthenticated attacker can consequently smuggle requests when an application uses AIOHTTP_NO_EXTENSIONS or otherwise runs without a standard wheel and an intermediary interprets the framing differently. This issue is fixed in version 3.14.4.","aliases":["GHSA-pqxq-w44r-73xw"],"modified":"2026-10-20T02:44:43.403364213Z","published":"2026-10-19T17:06:37.997Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-444"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111750.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111750.json"},{"type":"FIX","url":"https://github.com/aio-libs/aiohttp/commit/9b27347e61454d9f8ca2055f4c67a37dee336e83"},{"type":"WEB","url":"https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4"},{"type":"ADVISORY","url":"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-pqxq-w44r-73xw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111750"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/aio-libs/aiohttp","events":[{"introduced":"0"},{"fixed":"c72c7eaaa1337e4ceb611b13e382d6ccb54e4ecb"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"fixed":"3.14.4"}]}}],"versions":["v3.14.3","v3.14.2","v3.14.1","v3.14.0","v3.13.0","v3.12.0","v3.12.0rc1","v3.12.0rc0","v3.12.0b3","v3.12.0b2","v3.12.0b1","v3.12.0b0","v3.11.0","v3.11.0rc2","v3.11.0rc1","v3.11.0rc0","v3.11.0b5","v3.11.0b4","v3.11.0b3","v3.11.0b2","v3.11.0b1","v3.11.0b0","v3.10.0","v3.10.0rc0","v3.10.0b1","v3.10.0b0","v3.9.0","v3.9.0rc0","v3.9.0b1","v3.9.0b0","v3.8.0","v3.7.1","v3.7.0","v3.7.0b1","v3.7.0b0","v3.6.2","v3.6.2a2","v3.6.2a1","v3.6.1","v3.6.1b4","v3.6.1b3","v3.6.0","v3.6.0b0","v3.6.0a12","v3.6.0a11","v3.6.0a10","v3.6.0a9","v3.6.0a8","v3.6.0a7","v3.6.0a6","v3.6.0a5","v3.6.0a4","v3.6.0a3","v3.6.0a2","v3.6.0a1","v3.6.0a0","v3.5.4","v3.5.3","v3.5.2","v3.5.1","v3.5.0","v3.5.0b3","v3.5.0b2","v3.5.0b1","v3.5.0a1","v3.4.0","v3.4.0b2","v3.4.0b1","v3.4.0a3","v3.4.0a0","v3.2.0","v3.1.0","v3.0.0b4","v3.0.0b3","v3.0.0b2","v3.0.0b1","v3.0.0b0","v2.3.0","v2.3.0a4","v2.3.0a3","v2.3.0a2","v2.3.0a1","v2.2.0","v2.1.0","2.0.0","2.0.0rc1","1.3.0","v1.2.0","v1.1.1","v1.1.0","v1.0.1","v1.0.0","v0.22.1","v0.22.0","v0.22.0b6","v0.22.0b5","v0.22.0b4","v0.22.0b3","v0.22.0b2","v0.22.0b1","v0.22.0b0","4v0.21.6","v0.21.0","v0.20.1","v0.20.0","v0.19.0","v0.18.0","v0.17.0","v0.16.3","v0.16.2","v0.16.1","v0.16.0","v0.15.3","0.15.2","v0.15.2","v0.15.1","v0.15.0","v0.14.4","v0.14.3","v0.14.2","v0.14.1","v0.14.0","v0.13.1","v0.13.0","v0.12.0","v0.11.0","v0.10.1","v0.10.0","v0.9.2","v0.9.1","v0.9.0","v0.8.4","v0.8.3","0.8.2","v0.8.1","v0.8.0","v0.7.3","v0.7.2","v0.7.1","v0.7.0","v.0.6.5","v0.6.4","v0.6.3","v0.6.2","v0.6.1","v0.5.0","v0.4.2","v0.4.1","v0.4","v0.3","v0.2","v0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111750.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L"}]}