{"id":"CVE-2021-3737","revision":"6c713009a522440ba635a2be34064951","records":[{"revision":"6c713009a522440ba635a2be34064951","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2021-3737","aliases":[],"title":"A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time. The highest t…","description":"A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time. The highest threat from this vulnerability is to system availability.","state":0,"publishedAt":"2022-03-04T00:00:00+00:00","modifiedAt":"2026-10-14T09:49:50.701+00:00","affected":[{"ecosystem":"Vendor product","name":"python","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"n/a\",\n                    \"product\": \"python\",\n                    \"versions\": [\n                        {\n                            \"version\": \"Fixed in python v3.6.14, python v3.7.11, python v3.8.11, python v3.9.6, python v3.10.0b2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://bugs.python.org/issue44022","https://github.com/python/cpython/pull/25916","https://bugzilla.redhat.com/show_bug.cgi?id=1995162","https://github.com/python/cpython/pull/26503","https://ubuntu.com/security/CVE-2021-3737","https://www.oracle.com/security-alerts/cpujul2022.html","https://python-security.readthedocs.io/vuln/urllib-100-continue-loop.html","https://security.netapp.com/advisory/ntap-20220407-0009/","https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html","https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2021-3737","license":"CVE Program Terms of Use","key":"cve-program:CVE-2021-3737","identifiers":["CVE-2021-3737"]},"retained":false,"historicalAffected":[]}],"coverage":[]}