Improper Neutralization Affecting badkeys package, versions [,0.0.16)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-BADKEYS-14874407
- published13 Jan 2026
- disclosed5 Jan 2026
- creditHanno Böck
Introduced: 5 Jan 2026
CVE-2026-21439 (opens in a new tab)How to fix?
Upgrade badkeys to version 0.0.16 or higher.
Overview
badkeys is a Check cryptographic keys for known weaknesses
Affected versions of this package are vulnerable to Improper Neutralization of ASCII control characters in the badkeys command-line tool. An attacker can manipulate console output to display misleading or deceptive information by injecting vertical tabs, ANSI escape sequences, or similar characters.