PT-2026-43308 · Xyproto · Algernon
Fg0X0
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Publicado
2026-05-26
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Atualizado
2026-05-26
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CVE-2026-48126
CVSS v3.1
8.2
Alta
| Vetor | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N |
Algernon is a small self-contained pure-Go web server. Prior to 1.17.8, when algernon is started with --domain (or --letsencrypt, which silently turns on --domain at engine/flags.go:372), the request handler resolves the served directory by joining the configured --dir with the value of the client-supplied Host header. The join is performed by filepath.Join with no validation, so a Host: .. header walks one level above the document root. Subsequent file resolution then exposes everything in that parent directory — arbitrary file read, full directory listing, and, if any .lua file is present, server-side Lua execution. This vulnerability is fixed in 1.17.8.
Exploit
Correção
Relative Path Traversal
Path traversal
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Identificadores relacionados
Produtos afetados
Algernon