StackStorm before 3.4.1, in some situations, has an infinite loop that consumes all…
Priority LOW 38CWE-835Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-835.
Summary
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).
Why it matters now
EPSS 0.02475 84th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:stackstorm:stackstorm:*:*:*:*:*:*:*:* | before 3.4.1 | Vulnerable | StackStorm |
| cpe:2.3:a:python:python:*:*:*:*:*:*:*:* | before 3.0.0 | Running on | python-pillow |
- cpe:2.3:a:stackstorm:stackstorm:*:*:*:*:*:*:*:* Versions before 3.4.1 Vulnerable ·StackStorm
- cpe:2.3:a:python:python:*:*:*:*:*:*:*:* Versions before 3.0.0 Running on ·python-pillow
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-28667
References
More Stackstorm vulnerabilities
- TI-2021-20192 In StackStorm versions prior to 3.6.0, the jinja interpreter was not run in sandbox mode… CVSS 3.1HIGH 8.8
- TI-2022-21635 Improper access control in Key-Value RBAC in StackStorm version 3.7.0 didn't check the… CVSS 3.1HIGH 7.5
- TI-2019-06999 In st2web in StackStorm Web UI before 2.9.3 and 2.10.x before 2.10.3, it is possible to… CVSS 3.0MEDIUM 6.1
- TI-2022-21463 Cross-site scripting (XSS) vulnerability in the Web UI of StackStorm versions prior to… CVSS 3.1MEDIUM 5.4
- TI-2018-14401 Incorrect access control in StackStorm API (st2api) in StackStorm before 2.9.2 and 2.10.x… CVSS 3.0MEDIUM 5.3
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences