badkeys vulnerable to ASCII control character injection on console via malformed input

TRUNG BÌNH 5.3CVE-2026-21439 · GHSA-wjpc-4f29-83h3 · PYSEC-2026-1212 · Công bố 06/01/2026 · cập nhật 17/06/2026

Tóm tắt nhanh

CVE-2026-21439 là lỗ hổng mức TRUNG BÌNH (CVSS 5.3) ảnh hưởng badkeys, badkeys (badkeys).
Xác suất bị khai thác trong 30 ngày tới (EPSS): 0.33%, cao hơn 26.5% các lỗ hổng khác.
Cách xử lý: cập nhật lên 0.0.16 hoặc mới hơn.

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
badkeys PyPI	`< 0.0.16`	`0.0.16`
badkeys badkeys	`< 0.0.16`	`0.0.16`

Mô tả

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

Mô tả của NVD

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.