CVE-2026-21439

LOW EPSS 21.9%
Published Jan 6, 20265mo ago · Modified Jun 17, 20261w ago
2.0 CVSS 4.0
Low
Find Similar
Published Jan 6, 2026 5mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
2.0
Exploitability
—
Impact
—
Vector string
CVSS: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:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
21.9% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-150

Affected Products 1

VendorProductVersionRange
badkeysbadkeys* <0.0.16

References 4

  • github.com https://github.com/badkeys/badkeys/commit/635a2f3b1b50a895d8b09ec8629efc06189f349a
    Patch
  • github.com https://github.com/badkeys/badkeys/commit/de631f69f040974bb5fb442cdab9a1d904c64087
    Patch
  • github.com https://github.com/badkeys/badkeys/issues/40
    ExploitIssue TrackingThird Party Advisory
  • github.com https://github.com/badkeys/badkeys/security/advisories/GHSA-wjpc-4f29-83h3
    Third Party Advisory

Remediation

  • github.com https://github.com/badkeys/badkeys/commit/635a2f3b1b50a895d8b09ec8629efc06189f349a
    Patch
  • github.com https://github.com/badkeys/badkeys/commit/de631f69f040974bb5fb442cdab9a1d904c64087
    Patch