CVE WatchOct 14, 2026

CVE-2021-3737

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

CVSS

7.5

High

EPSS

13.2%

p96

KEV

—

Exploit Today

0-100

Published: Mar 4, 2022 · Last modified: Oct 14, 2026 · CWE-835 · CWE-400

EPSS · 30d

11.6%EPSS · 30 days13.2%

2026-09-272026-10-25

Technical 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.

Official references

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