CVE-2026-46430

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 v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

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

Configurations

No configuration.

History

No history.

Information

Published : 2026-05-26 17:16

Updated : 2026-07-24 11:10

NVD link : CVE-2026-46430

Mitre link : CVE-2026-46430

CVE.ORG link : CVE-2026-46430

JSON object : View

Products Affected

No product.

CWE

CWE-668

Exposure of Resource to Wrong Sphere

CWE-1188

Initialization of a Resource with an Insecure Default

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