CVE-2026-21439
January 05, 2026
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.
Affected Packages
https://github.com/badkeys/badkeys.git (GITHUB):
Affected version(s) >=v0.0.1 <v0.0.16Fix Suggestion:
Update to version v0.0.16badkeys (PYTHON):
Affected version(s) >=0.0.1 <0.0.16Fix Suggestion:
Update to version 0.0.16Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
2
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
Exploit Maturity
POC
CVSS v3
Base Score:
4
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Escape, Meta, or Control Sequences
EPSS
Base Score:
0.01
