CVE-2026-21439

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  2. Vulnerabilities (CVE)
  3. CVE-2026-21439

5.3 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

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adkeys 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.

References
Link Resource
https://github.com/badkeys/badkeys/commit/635a2f3b1b50a895d8b09ec8629efc06189f349a Patch
https://github.com/badkeys/badkeys/commit/de631f69f040974bb5fb442cdab9a1d904c64087 Patch
https://github.com/badkeys/badkeys/issues/40 Exploit Issue Tracking Third Party Advisory
https://github.com/badkeys/badkeys/security/advisories/GHSA-wjpc-4f29-83h3 Third Party Advisory
https://github.com/badkeys/badkeys/issues/40 Exploit Issue Tracking Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:badkeys:badkeys:*:*:*:*:*:python:*:*
History

12 Jan 2026, 18:18

Type Values Removed Values Added
CPE cpe:2.3:a:badkeys:badkeys:*:*:*:*:*:python:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.3
First Time Badkeys
Badkeys badkeys
References () https://github.com/badkeys/badkeys/commit/635a2f3b1b50a895d8b09ec8629efc06189f349a - () https://github.com/badkeys/badkeys/commit/635a2f3b1b50a895d8b09ec8629efc06189f349a - Patch
References () https://github.com/badkeys/badkeys/commit/de631f69f040974bb5fb442cdab9a1d904c64087 - () https://github.com/badkeys/badkeys/commit/de631f69f040974bb5fb442cdab9a1d904c64087 - Patch
References () https://github.com/badkeys/badkeys/issues/40 - () https://github.com/badkeys/badkeys/issues/40 - Exploit, Issue Tracking, Third Party Advisory
References () https://github.com/badkeys/badkeys/security/advisories/GHSA-wjpc-4f29-83h3 - () https://github.com/badkeys/badkeys/security/advisories/GHSA-wjpc-4f29-83h3 - Third Party Advisory

06 Jan 2026, 19:16

Type Values Removed Values Added
References () https://github.com/badkeys/badkeys/issues/40 - () https://github.com/badkeys/badkeys/issues/40 -

06 Jan 2026, 00:15

Type Values Removed Values Added
New CVE
Information

Published : 2026-01-06 00:15

Updated : 2026-01-12 18:18

NVD link : CVE-2026-21439

Mitre link : CVE-2026-21439

CVE.ORG link : CVE-2026-21439

JSON object : View

Products Affected

badkeys

CWE
CWE-150

Improper Neutralization of Escape, Meta, or Control Sequences