CVE-2026-46430
MEDIUM
NVD
CVSS Score
4.3
Severity
MEDIUM
Published
May 26, 2026
Vendor
unknown
Description
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.