Low

badkeys vulnerable to ASCII control character injection on console via malformed input

Disclosed: 05.01.2026
Updated: 11.10.2026 13:19

Impact

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.

Patches

This has been fixed with the following commits: https://github.com/badkeys/badkeys/commit/de631f69f040974bb5fb442cdab9a1d904c64087 https://github.com/badkeys/badkeys/commit/635a2f3b1b50a895d8b09ec8629efc06189f349a

All users should upgrade badkeys to version 0.0.16.

Resources

https://github.com/badkeys/badkeys/issues/40

Affected software

Click a technology to see all vulnerabilities affecting it.

Platform	Package	Vulnerable versions	Fixed in
Python (PyPI)	badkeys	< 0.0.16	0.0.16

References

CVSS score -

CVSS vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
Weakness (CWE): CWE-150
Platform: Python (PyPI)
Package: badkeys
Disclosed: 05.01.2026
Updated: 11.10.2026 13:19

Sources and licenses

OSV / GitHub Advisory Database - PYSEC-2026-1212 - PyPA Advisory Database; CC BY 4.0

OSV / GitHub Advisory Database - GHSA-wjpc-4f29-83h3 - CC BY 4.0

Vulnerability history: badkeys

All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.

This is the only known vulnerability of this package.

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