VULNERABILITY INTELLIGENCE
CVE-2026-46430
CVSS score4.3 MEDIUM
EPSS probability0.20%
CISA KEVNot currently listed
Published2026-05-26
Last modified2026-07-24
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
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.
Weakness classification
- security-advisories@github.com: CWE-668