🛡️ CVE-2023-43644
🔴 CVSS 9.5 — Critical ✅ No Known Exploit CWE-306 NVD
9.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Sing-box is an open source proxy system. Affected versions are subject to an authentication bypass when specially crafted requests are sent to sing-box. This affects all SOCKS5 inbounds with user authentication and an attacker may be able to bypass authentication. Users are advised to update to sing-box 1.4.4 or to 1.5.0-rc.4. Users unable to update should not expose the SOCKS5 inbound to insecure environments.

Details

Severity CRITICAL
CVSS Score 9.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CWE CWE-306
Public Exploit ✅ No
Source NVD
Published 2023-09-26
Updated 2026-06-15
Modified 2023-11-08
Fix URL N/A

Affected Packages

Software From version Fixed in
github.com/sagernet/sing
github.com/sagernet/sing-box
sing-box

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