PyPI: st2client

CVE-2021-28667

Safety vulnerability ID: SFTY-20210318-44151

Safety legacy ID: pyup.io-40034

StackStorm before 3.4.1, in some situations, has an infinite loop that consumes all available memory and disk space. This can occur if Python 3.x is used, the locale is not utf-8, and there is an attempt to log Unicode data (from an action or rule name). See CVE-2021-28667.

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Created at: Jul 5, 2026Updated at: Jul 5, 2026

Overview

StackStorm st2 Infinite Loop Condition

Advisory

StackStorm before 3.4.1, in some situations, has an infinite loop that consumes all available memory and disk space. This can occur if Python 3.x is used, the locale is not utf-8, and there is an attempt to log Unicode data (from an action or rule name). See CVE-2021-28667.

Affected Package

Affecting st2client package, versions<3.4.1

Also affects

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How to Fix

Upgradest2clientto3.4.1or higher.

Mitigation and Workarounds

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Vulnerable Functions

Functions linked to known vulnerabilities.

Vulnerable function data is available for Enterprise customers

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References

Safety

Verified by Safety

Our Cybersecurity Intelligence Team reviewed this vulnerability. We combine public data with our own research to find issues not yet reported to public sources.

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