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18 April 2026

Vulnerabilities first published on this day (UTC), newest first.

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All Critical High Medium Low Exploited only Public exploit

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  • High 8.6
    CVE-2026-40489 Public exploit

    editorconfig-core-c has incomplete fix for CVE-2023-0341

    editorconfig-core-c is an EditorConfig core library for use by plugins supporting EditorConfig parsing. Versions up to and including 0.12.10 have a stack-based buffer overflow in ec_glob() that allows an attacker to crash any application using libeditorconfig…

    editorconfig editorconfig-core-c editorconfig-core editorconfig-core Debian Ubuntu Alpine
  • High 8.9
    CVE-2026-40487 Public exploit

    Postiz Has Unrestricted File Upload via MIME Type Spoofing that Leads to Stored XSS

    Postiz is an AI social media scheduling tool. Prior to version 2.21.6, a file upload validation bypass allows any authenticated user to upload arbitrary HTML, SVG, or other executable file types to the server by spoofing the `Content-Type` header. The uploade…

    gitroomhq postiz-app