CVE-2026-56732— Zammad: Malicious input in Ticket Body Enables Session Termination
Quick assessment
Affected
zammad zammad
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Zammad 是一款基于 Web 的开源帮助台/客户服务系统。在 7.0.2 版本之前，Zammad 的 HTML sanitization（HTML 清理/过滤）机制存在漏洞，攻击者可向工单正文中注入特定的 HTML 元素。当其他用户查看该构造的工单时，所注入的 HTML 元素可触发登出请求，从而导致该用户的会话被终止。此漏洞已在 Zammad 7.0.2 版本中得到修复。
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I. Basic Information for CVE-2026-56732
Vulnerability Information
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Vulnerability Title
Zammad: Malicious input in Ticket Body Enables Session Termination
Source: CVE Program / CVE List V5
Vulnerability Description
Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, vulnerability in Zammad's HTML sanitization allows injection of specific HTML elements into ticket bodies. When another user views the crafted ticket, the injected element can trigger a logout request, terminating the viewer's session. This vulnerability is fixed in 7.0.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-56732
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-56732 (3)
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https://github.com/zammad/zammad/releases/tag/7.0.2 x_refsource_MISC
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https://github.com/zammad/zammad/security/advisories/GHSA-6rmm-28j9-q99q x_refsource_CONFIRM
Same Patch Batch · zammad · 2026-09-25 · 30 CVEs total
| CVE-2026-84458 | 9.1 CRITICAL | Zammad: Account takeover via unverified email matching during SSO auto-link |
| CVE-2026-61525 | 8.8 HIGH | Zammad: Arbitrary File Deletion via Unvalidated Session Identifier in Long Polling Control |
| CVE-2026-56733 | 8.7 HIGH | Zammad: Incorrect Authorization and Improper Privilege Management |
| CVE-2026-56725 | 8.7 HIGH | Zammad: Denial of Service via OTRS Import Controller |
| CVE-2026-84462 | 8.6 HIGH | Zammad: AI Agent template sanitizer bypass leads to remote code execution |
| CVE-2026-56731 | 8.4 HIGH | Zammad: Cross-Site Scripting in Ticket Notifications |
| CVE-2026-56724 | 7.1 HIGH | Zammad: Incorrect implementation of permission checks in the knowledge base module |
| CVE-2026-84465 | 7.1 HIGH | Zammad: S/MIME signature verification allows forged sender impersonation |
| CVE-2026-84464 | 7.1 HIGH | Zammad: IDOR in External Data Source rendering exposes ticket, user, group, and organizati |
| CVE-2026-56727 | 7.1 HIGH | Zammad: PGP signature spoofing via unvalidated verification return |
| CVE-2026-56723 | 7.1 HIGH | Zammad: Missing authorization on ticket attachment download |
| CVE-2026-84461 | 6.9 MEDIUM | Zammad: Missing rate limiting allows password brute-forcing during two-factor login |
| CVE-2026-63207 | 6.9 MEDIUM | Zammad: Sensitive Information Exposure in Integration Administration API |
| CVE-2026-84463 | 6.3 MEDIUM | Zammad: Stored HTML injection in Knowledge Base video widget enables forced session switch |
| CVE-2026-56728 | 5.3 MEDIUM | Zammad: Cross-User Taskbar Item Access Control Vulnerability |
| CVE-2026-63206 | 5.3 MEDIUM | Zammad: Remote image tracking bypass via shortened URL scheme |
| CVE-2026-56734 | 5.3 MEDIUM | Zammad: Avatar Image URL Server-Side Request Forwarding |
| CVE-2026-56735 | 5.3 MEDIUM | Zammad: Improper neutralization of `srcset` attribute in IMG tags in Zammad |
| CVE-2026-84460 | 5.3 MEDIUM | Zammad: Missing Authorization in TagsController#list Allows Cross-Object Tag Enumeration |
| CVE-2026-61855 | 5.3 MEDIUM | Zammad: Invalid PGP Detached Signatures Reported as Good Signature on Inbound Mail |
Showing top 20 of 30 CVEs. View all on vendor page → →
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Same weakness: CWE-20
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V. Comments for CVE-2026-56732
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