CVE-2026-21439
Python vulnerability analysis and mitigation

badkeys is a tool and library for checking cryptographic public keys for known vulnerabilities. In versions 0.0.15 and below, an attacker may inject content with ASCII control characters like vertical tabs, ANSI escape sequences, etc., that can create misleading output of the badkeys command-line tool. This impacts scanning DKIM keys (both --dkim and --dkim-dns), SSH keys (--ssh-lines mode), and filenames in various modes. This issue is fixed in version 0.0.16.


SourceNVD

Related Python vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

GHSA-f2mf-q878-gh58MEDIUM5.3
  • PythonPython
  • parsl
NoYesJan 06, 2026
CVE-2026-21892MEDIUM5.3
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CVE-2026-21851MEDIUM5.3
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CVE-2026-21883MEDIUM4.5
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CVE-2026-21439LOW2
  • PythonPython
  • badkeys
NoYesJan 06, 2026

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