VULNERABILITY INTELLIGENCE

CVE-2026-21439

CVSS score2 LOW

EPSS probability0.33%

CISA KEVNot currently listed

Published2026-01-06

Last modified2026-06-17

CVSS vectorCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Description

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.

Weakness classification

CWE-150: Improper Neutralization of Escape, Meta, or Control Sequences

Primary references

security-advisories@github.com — Patch
security-advisories@github.com — Patch
security-advisories@github.com — Exploit, Issue Tracking, Third Party Advisory
security-advisories@github.com — Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0 — Exploit, Issue Tracking, Third Party Advisory