CVE-2021-3737

Updated: 2026-02-25 09:53:29.096791

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

AlmaLinux 9.2 ESU php 8.0.30 7.5 HIGH Not Vulnerable 2025-09-30 05:27:22
Alpine Linux 3.18 ELS php 8.2.16 7.5 HIGH Not Vulnerable 2025-12-29 18:11:13
CentOS 6 ELS python 2.6.6 7.5 HIGH Released CLSA-2022:1647958513 2022-05-05 12:04:56
CentOS 6 ELS php 5.3.3 7.5 HIGH Not Vulnerable 2025-10-09 15:40:29
CentOS 7 ELS python 2.7.5 7.5 HIGH Released CLSA-2023:1697739734 2023-10-19 21:09:37
CentOS 7 ELS python3 3.6.8 7.5 HIGH Released CLSA-2023:1697739575 2023-10-19 21:09:39
CentOS 7 ELS php 5.4.16 7.5 HIGH Not Vulnerable 2025-10-09 15:40:30
CentOS 8.4 ELS php 7.4.6 7.5 HIGH Not Vulnerable 2025-10-09 15:40:32
CentOS 8.4 ELS python3 3.6.8 7.5 HIGH Released CLSA-2022:1653920195 2022-05-30 11:37:29
CentOS 8.4 ELS python2 2.7.18 7.5 HIGH Released CLSA-2022:1654525948 2022-06-06 11:47:17
Total: 33