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CVE-2026-34403 Nginx-UI vulnerable to Cross-Site WebSocket Hijacking (CSWSH) via missing origin validation on all WebSocket endpoints

🗓️ 20 Apr 2026 20:16:47Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 57 Views

Nginx UI before 2.3.5 is vulnerable to cross-site WebSocket hijacking due to origin checks and insecure cookies.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-34403
20 Apr 202620:16
–attackerkb
bdu_fstec
BDU FSTEC
Nginx UI WebSocket Origin Disclosure
27 May 202600:00
–bdu_fstec
circl
Circl
CVE-2026-34403
20 Apr 202622:19
–circl
cnnvd
CNNVD
Nginx UI 安全漏洞
20 Apr 202600:00
–cnnvd
cve
CVE
CVE-2026-34403
20 Apr 202620:16
–cve
euvd
EUVD
EUVD-2026-23972
21 Apr 202615:13
–euvd
github
Github Security Blog
Nginx-UI: Cross-Site WebSocket Hijacking (CSWSH) via missing origin validation on all WebSocket endpoints
21 Apr 202615:13
–github
gitlab
GitLab Advisory Database
Nginx-UI: Cross-Site WebSocket Hijacking (CSWSH) via missing origin validation on all WebSocket endpoints
21 Apr 202600:00
–gitlab
mend
Mend
CVE-2026-34403
20 Apr 202620:16
–mend
nvd
NVD
CVE-2026-34403
20 Apr 202621:16
–nvd
Rows per page
[
  {
    "vendor": "0xJacky",
    "product": "nginx-ui",
    "versions": [
      {
        "version": "< 2.3.5",
        "status": "affected"
      }
    ]
  }
]

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