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CVE-2026-40487

🗓️ 18 Apr 2026 01:19:06Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 81 Views🌐 WEB

Before 2.21.6, Postiz allowed authenticated uploads of HTML or SVG via Content Type spoofing, enabling stored cross site scripting.

Related
Detection
Affected
Refs
Paths
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-40487
18 Apr 202601:19
–attackerkb
circl
Circl
CVE-2026-40487
18 Apr 202603:13
–circl
cnnvd
CNNVD
Gitroom Postiz security vulnerabilities
18 Apr 202600:00
–cnnvd
cvelist
Cvelist
CVE-2026-40487 Postiz Has Unrestricted File Upload via MIME Type Spoofing that Leads to Stored XSS
18 Apr 202601:19
–cvelist
euvd
EUVD
EUVD-2026-23634
18 Apr 202601:19
–euvd
kitploit
Kitploit
CVE-2026-40487
31 Oct 202603:01
–kitploit
mend
Mend
CVE-2026-40487
18 Apr 202601:19
–mend
nvd
NVD
CVE-2026-40487
18 Apr 202602:16
–nvd
osv_cve
osv_cve
CVE-2026-40487 Postiz Has Unrestricted File Upload via MIME Type Spoofing that Leads to Stored XSS
18 Apr 202601:19
–osv_cve
ptsecurity
Positive Technologies
PT-2026-33243
16 Apr 202600:00
–ptsecurity
Rows per page
NVD
Node
gitroompostizRange<2.21.6
[
  {
    "vendor": "gitroomhq",
    "product": "postiz-app",
    "versions": [
      {
        "version": "< 2.21.6",
        "status": "affected"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
Content-Typeheader/uploadFile upload validation bypass via Content-Type header spoofing allows uploading of executable files (HTML, SVG) leading to Stored XSS.CWE-345, CWE-434, CWE-79

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26 Oct 2026 21:10Current
6Medium risk
Vulners AI Score6
CVSS 3.18.9 - 9
EPSS0.00224
SSVC
81