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I. Basic Information for CVE-2026-21439
Vulnerability Information

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Vulnerability Title
badkeys vulnerable to ASCII control character injection on console via malformed input
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
转义、元或控制序列转义处理不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
badkeys 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
badkeys是badkeys开源的一个检查加密公钥是否存在漏洞的工具库。 badkeys 0.0.15及之前版本存在安全漏洞,该漏洞源于攻击者可注入包含ASCII控制字符的内容,可能产生误导性输出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
badkeysbadkeys < 0.0.16 -
II. Public POCs for CVE-2026-21439
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III. Intelligence Information for CVE-2026-21439
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IV. Related Vulnerabilities
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