CVE-2021-28667

7.5 highEPSS 2.5%

High (7.5) in stackstorm stackstorm. EPSS 2.5% chance of exploitation in the next 30 days.

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).

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 2.5% chance of exploitation in the next 30 days; higher than 84% of CVEs (scores of 2026-10-31)
CWE: CWE-835
Published: 2021-03-18
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

stackstorm:stackstorm

References

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

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