CVE-2026-21439
badkeys vulnerable to ASCII control character injection on console via malformed input
Impact
### Impact 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. ### Patches This has been fixed with the following commits: https://github.com/badkeys/badkeys/commit/de631f69f040974bb5fb442cdab9a1d904c64087 https://github.com/badkeys/badkeys/commit/635a2f3b1b50a895d8b09ec8629efc06189f349a All users should upgrade `badkeys` to version 0.0.16. ### Resources https://github.com/badkeys/badkeys/issues/40
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | badkeys | <= 0.0.15 | 0.0.16 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Badkeys | Badkeys | before 0.0.16 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/badkeys/badkeys/commit/635a2f3b1b50a895d8b09ec8629efc06189f349a
- https://github.com/badkeys/badkeys/commit/de631f69f040974bb5fb442cdab9a1d904c64087
- https://github.com/badkeys/badkeys/issues/40
- https://github.com/badkeys/badkeys/security/advisories/GHSA-wjpc-4f29-83h3
- https://github.com/advisories/GHSA-wjpc-4f29-83h3
- https://nvd.nist.gov/vuln/detail/CVE-2026-21439