CVE-2026-46430 — Algernon: Auto-refresh SSE event server binds to all interfaces by default on Linux/macOS
Algernon is a small self-contained pure-Go web server. Prior to 1.17.7, the SSE event server bound to 0.0.0.0:5553 on Linux/macOS by default because the platform-dependent host …
Published: 2026-05-26 · CVSS: 4.3 · CVSS 3.1
Algernon is a small self-contained pure-Go web server. Prior to 1.17.7, the SSE event server bound to 0.0.0.0:5553 on Linux/macOS by default because the platform-dependent host default in engine/flags.go:39-46 set host = "" for non-Windows, and utils.JoinHostPort("", ":5553") resolves to ":5553". This vulnerability is fixed in 1.17.7.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7