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I. Basic Information for CVE-2026-34718
Vulnerability Information

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Vulnerability Title
Zammad improperly neutralizes of script-related HTML tags in ticket articles
Source: NVD (National Vulnerability Database)
Vulnerability Description
Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the HTML sanitizer for ticket articles was missing proper sanitization of data: ... URI schemes, resulting in storing such malicious content in the database of the Zammad instance. The Zammad GUI is rendering this content, due to applied CSP rules no harm was done by e.g., clicking such a link. This vulnerability is fixed in 7.0.1 and 6.5.4.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
Web页面中脚本相关HTML标签转义处理不恰当(基本跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Zammad 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zammad是德国Zammad公司的一套票务管理软件。 Zammad 7.0.1之前版本和6.5.4之前版本存在安全漏洞,该漏洞源于HTML清理器对data: URI方案清理不当,可能导致存储恶意内容。
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)
II. Public POCs for CVE-2026-34718
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III. Intelligence Information for CVE-2026-34718
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