← Back to CVEs

CVE-2026-21439

MEDIUM

5.3

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.

CVE Details

CVSS v3.1 Score5.3

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published1/6/2026

Last Modified1/12/2026

Sourcenvd

Honeypot Sightings0

Affected Products

badkeys:badkeys

Weaknesses (CWE)

CWE-150

References

https://github.com/badkeys/badkeys/commit/635a2f3b1b50a895d8b09ec8629efc06189f349a(security-advisories@github.com)

https://github.com/badkeys/badkeys/commit/de631f69f040974bb5fb442cdab9a1d904c64087(security-advisories@github.com)

https://github.com/badkeys/badkeys/issues/40(security-advisories@github.com)

https://github.com/badkeys/badkeys/security/advisories/GHSA-wjpc-4f29-83h3(security-advisories@github.com)

https://github.com/badkeys/badkeys/issues/40(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.