VulnerabilityDeferred

CVE-2026-46430

This vulnerability is fixed in 1.17.7.

MEDIUM 4.3EPSS 0.20%

Does this matter?

Lower severity and a low EPSS score (0.20%). Track it; it rarely justifies an emergency change on its own.

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 3.1: 4.3 MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS: 0.20% probability · 10th percentile
CISA KEV: Not listed
Weakness: CWE-668, CWE-1188
Source: security-advisories@github.com

References

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

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.