CVE-2021-3737

Updated: 2026-02-20 03:46:01.815734

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.


Links NIST CIRCL RHEL Ubuntu

Severity

Severity Score
CVSS Version 2.x HIGH 7.1
CVSS Version 3.x HIGH 7.5

Status

OS name Project name Version Score Severity Status Errata Last updated

Statement

Alpine Linux 3.22 python 3.9 7.5 HIGH Not Vulnerable 2026-02-02 14:29:49 Not affected: the deployed Python runtime is 3.9.23, which is newer than the last vulnerable release...
Alpine Linux 3.22 python 3.7 7.5 HIGH Not Vulnerable 2026-02-16 14:40:22 Not affected: the deployed Python runtime is 3.9.23, which is newer than the last vulnerable release...
Alpine Linux 3.22 python 3.8 7.5 HIGH Not Vulnerable 2026-02-07 04:07:38 Not affected: the deployed Python runtime is 3.9.23, which is newer than the last vulnerable release...
Alpine Linux 3.22 python 3.6 7.5 HIGH Already Fixed 2026-01-27 16:43:18 Not affected: the deployed Python runtime is 3.9.23, which is newer than the last vulnerable release...
Debian 10 python 3.6 7.5 HIGH Already Fixed 2025-09-05 09:16:30
Debian 10 python 2.7 7.5 HIGH Released CLSA-2025:1760024436 2025-10-10 00:31:38
Debian 11 python 2.7 7.5 HIGH Released CLSA-2025:1760093456 2025-10-10 11:08:30
Debian 11 python 3.6 7.5 HIGH Already Fixed 2025-09-05 09:16:30
Debian 12 python 3.9 7.5 HIGH Not Vulnerable 2025-12-05 12:36:28 Not affected: the deployed Python runtime is 3.9.23, which is newer than the last vulnerable release...
Debian 12 python 3.7 7.5 HIGH Not Vulnerable 2025-11-21 15:04:46 Not affected: the deployed Python runtime is 3.9.23, which is newer than the last vulnerable release...
Total: 35