CVE-2026-46430

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.

CVSS Vector

References

• https://github.com/xyproto/algernon/security/advisories/GHSA-gj84-924c-48fx
• https://github.com/xyproto/algernon/security/advisories/GHSA-gj84-924c-48fx