{"id":"BIT-libpython-2021-3737","details":"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.","aliases":["BIT-python-2021-3737","BIT-python-min-2021-3737","CVE-2021-3737","PSF-2022-7"],"modified":"2026-01-15T01:56:29.524837Z","published":"2025-08-11T13:51:55.583Z","database_specific":{"cpes":["cpe:2.3:a:python:python:*:*:*:*:*:*:*:*"],"severity":"High"},"references":[{"type":"WEB","url":"https://bugs.python.org/issue44022"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1995162"},{"type":"WEB","url":"https://github.com/python/cpython/pull/25916"},{"type":"WEB","url":"https://github.com/python/cpython/pull/26503"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3737"},{"type":"WEB","url":"https://python-security.readthedocs.io/vuln/urllib-100-continue-loop.html"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20220407-0009/"},{"type":"WEB","url":"https://ubuntu.com/security/CVE-2021-3737"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpujul2022.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/11/msg00024.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/12/msg00000.html"}],"affected":[{"package":{"name":"libpython","ecosystem":"Bitnami","purl":"pkg:bitnami/libpython"},"ranges":[{"type":"SEMVER","events":[{"introduced":"3.6.0"},{"fixed":"3.6.14"},{"introduced":"3.7.0"},{"fixed":"3.7.11"},{"introduced":"3.8.0"},{"fixed":"3.8.11"},{"introduced":"3.9.0"},{"fixed":"3.9.6"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/libpython/BIT-libpython-2021-3737.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}],"schema_version":"1.7.3"}