CVSS 4.0
2.0 lowCVSS: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:PCVE-2026-21439
Low (2.0) in badkeys badkeys. EPSS 0.3% chance of exploitation in the next 30 days. Fixed in badkeys 0.0.16.
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.
Severity
CVSS 3.1
5.3 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 26% of CVEs (scores of 2026-10-31)
- CWE
- CWE-150
- Published
- Modified
- Record from
- the NVD, synced
Affected
- badkeys:badkeys
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-wjpc-4f29-83h3 | PyPI | badkeys | <0.0.16 | 0.0.16 |
| PYSEC-2026-1212 | PyPI | badkeys | <0.0.16 | 0.0.16 |
References
- 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/badkeys/badkeys/issues/40