CVE-2026-21439
5.3MEDIUMbadkeys 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
Published: 1/6/2026Updated: 1/12/2026
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.
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Affected Products
badkeysbadkeys
References
- https://github.com/badkeys/badkeys/commit/635a2f3b1b50a895d8b09ec8629efc06189f349aPatch
- https://github.com/badkeys/badkeys/commit/de631f69f040974bb5fb442cdab9a1d904c64087Patch
- https://github.com/badkeys/badkeys/issues/40ExploitIssue TrackingThird Party Advisory
- https://github.com/badkeys/badkeys/security/advisories/GHSA-wjpc-4f29-83h3Third Party Advisory
- https://github.com/badkeys/badkeys/issues/40ExploitIssue TrackingThird Party Advisory