CVE-2026-52792: Improper Handling of Windows ::DATA Alternate Data Stream

Algernon is a small self-contained pure-Go web server. Prior to 1.17.9, Algernon on Windows selects a file handler in engine/handlers.go by calling filepath.Ext without first rejecting NTFS-equivalent names such as x.lua::$DATA, x.lua., and x.lua . An unauthenticated client can append one of thes...

PT-2026-55477

Name of the Vulnerable Software and Affected Versions Algernon version 1.17.8 Description On Windows hosts using the NTFS filesystem, an unauthenticated client can retrieve the raw source code of server-side scripts such as .lua, .tl, .po2, .amber, or .frm located on public paths. This occurs...