CVE-2026-46430

MediumCVSS 4.3/10Last modified Jul 24, 2026

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.

Metrics

CVSS 3.1 4.3/10CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-668 CWE-1188

Affected software

No affected versions have been published.

Timeline

Published: May 26, 2026
Last modified: Jul 24, 2026
NVD status: Deferred

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