CVE-2026-34720— Zammad has an origin validation error in SSO mechanism
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I. Basic Information for CVE-2026-34720
Vulnerability Information
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Vulnerability Title
Zammad has an origin validation error in SSO mechanism
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 SSO mechanism in Zammad was not verifying the header originates from a trusted SSO proxy/gateway before applying further actions on it. 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
源验证错误
Source: NVD (National Vulnerability Database)
Vulnerability Title
Zammad 访问控制错误漏洞
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之前版本存在访问控制错误漏洞，该漏洞源于SSO机制未验证标头来源，可能导致安全风险。
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
II. Public POCs for CVE-2026-34720
| # | POC Description | Source Link | Shenlong Link |
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Same Patch Batch · zammad · 2026-04-08 · 10 CVEs total
| CVE-2026-34722 | Zammad is missing authorization in ticket create endpoint | |
| CVE-2026-34724 | Zammad has a server-side template injection leading to RCE via AI Agent | |
| CVE-2026-34837 | Zammad is miissing authorization in AI assistance controller for context data used in text | |
| CVE-2026-34248 | Zammad has an information disclosure in ticket detail view of customers in shared organiza | |
| CVE-2026-34721 | Zammad has Cross-site request forgery (CSRF) in OAuth callback endpoints | |
| CVE-2026-34719 | Zammad has a Server-side request forgery (SSRF) via webhooks | |
| CVE-2026-34718 | Zammad improperly neutralizes of script-related HTML tags in ticket articles | |
| CVE-2026-34782 | Zammad has improper access control in AI assistance controller for text tools | |
| CVE-2026-34723 | Zammad has incorrect access control in getting_started_controller |
IV. Related Vulnerabilities
Same product: zammad
- CVE-2026-34837
Zammad is miissing authorization in AI assistance controller - CVE-2026-34782
Zammad has improper access control in AI assistance controll - CVE-2026-34724
Zammad has a server-side template injection leading to RCE v - CVE-2026-34723
Zammad has incorrect access control in getting_started_contr - CVE-2026-34722
Zammad is missing authorization in ticket create endpoint
Same vendor: zammad
- CVE-2026-34837
Zammad is miissing authorization in AI assistance controller - CVE-2026-34782
Zammad has improper access control in AI assistance controll - CVE-2026-34724
Zammad has a server-side template injection leading to RCE v - CVE-2026-34723
Zammad has incorrect access control in getting_started_contr - CVE-2026-34722
Zammad is missing authorization in ticket create endpoint
Same weakness: CWE-346
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RCE in TUBITAK BILGEM's Liderahenk - CVE-2026-43870
Apache Thrift: Node.js web_server.js multi-vulnerability - CVE-2026-7439
AgentFlow Local Web API Content-Type Validation Bypass - CVE-2026-41398
OpenClaw - Unauthorized Agent Request Dispatch via Untrusted - CVE-2026-41393
OpenClaw < 2026.3.31 - Arbitrary DNS Authority Acceptance an
V. Comments for CVE-2026-34720
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