CVE-2026-46430— Algernon: Auto-refresh SSE event server binds to all interfaces by default on Linux/macOS
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-46430
Vulnerability Information
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Vulnerability Title
Algernon: Auto-refresh SSE event server binds to all interfaces by default on Linux/macOS
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
将资源暴露给错误范围
Source: NVD (National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-46430
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-46430 (1)
Same Patch Batch · xyproto · 2026-05-26 · 7 CVEs total
| CVE-2026-45721 | 9.0 CRITICAL | Algernon: handler.lua discovery walks parent directories above the server root |
| CVE-2026-48126 | 8.2 HIGH | Algernon: Host header path traversal in --domain mode reads files and runs Lua from parent |
| CVE-2026-45728 | 7.5 HIGH | Algernon: Single-file mode unconditionally enables debug mode |
| CVE-2026-46431 | 4.3 MEDIUM | Algernon: Auto-refresh SSE event server sets Access-Control-Allow-Origin: * |
| CVE-2026-43981 | Algernon: Race Condition in handle() shared LState | |
| CVE-2026-43982 | Algernon: Path traversal file write via savein() |
IV. Related Vulnerabilities
Same product: algernon
- CVE-2026-48126
Algernon: Host header path traversal in --domain mode reads - CVE-2026-46431
Algernon: Auto-refresh SSE event server sets Access-Control- - CVE-2026-45728
Algernon: Single-file mode unconditionally enables debug mod - CVE-2026-45721
Algernon: handler.lua discovery walks parent directories abo - CVE-2026-43981
Algernon: Race Condition in handle() shared LState
Same vendor: xyproto
- CVE-2026-48126
Algernon: Host header path traversal in --domain mode reads - CVE-2026-46431
Algernon: Auto-refresh SSE event server sets Access-Control- - CVE-2026-45728
Algernon: Single-file mode unconditionally enables debug mod - CVE-2026-45721
Algernon: handler.lua discovery walks parent directories abo - CVE-2026-43981
Algernon: Race Condition in handle() shared LState
Same weakness: CWE-668
- CVE-2026-46723
Information Disclosure in extension "Faceted Search" (ke_sea - CVE-2026-44552
Open WebUI: Redis Cache Keys tool_servers and terminal_serve - CVE-2026-45411
vm2: Sandbox Breakout Using Async Generator - CVE-2026-44009
vm2: Sandbox Breakout Through Null Proto Exception - CVE-2026-44008
vm2: Snabox breakout via `neutralizeArraySpeciesBatch`
V. Comments for CVE-2026-46430
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