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CVE-2026-34720 Zammad has an origin validation error in SSO mechanism

🗓️ 08 Apr 2026 18:11:23Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 14 Views

Zammad SSO origin validation failed to verify header from a trusted proxy, enabling spoofing before versions 7.0.1 and 6.5.4; fixed in those versions.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
CNNVD
Zammad 访问控制错误漏洞
8 Apr 202600:00
cnnvd
CVE
CVE-2026-34720
8 Apr 202618:11
cve
EUVD
EUVD-2026-20560
8 Apr 202618:11
euvd
NVD
CVE-2026-34720
8 Apr 202619:25
nvd
Positive Technologies
PT-2026-31417
8 Apr 202600:00
ptsecurity
RedhatCVE
CVE-2026-34720
9 Apr 202619:23
redhatcve
Vulnrichment
CVE-2026-34720 Zammad has an origin validation error in SSO mechanism
8 Apr 202618:11
vulnrichment
[
  {
    "vendor": "zammad",
    "product": "zammad",
    "versions": [
      {
        "version": "< 6.5.4",
        "status": "affected"
      },
      {
        "version": ">= 7.0.0-alpha, < 7.0.1",
        "status": "affected"
      }
    ]
  }
]

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