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CVE-2026-40487 Postiz Has Unrestricted File Upload via MIME Type Spoofing that Leads to Stored XSS

🗓️ 18 Apr 2026 01:19:06Reported by GitHub_MType 
vulnrichment
 vulnrichment
🔗 github.com👁 22 Views

Prior to 2.21.6, authenticated uploads spoof Content-Type to store HTML or SVG, enabling stored cross site scripting.

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18 Apr 2026 01:19Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.18.9
EPSS0.00224
SSVC
22