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CVE-2026-55642— dbx: Unauthenticated arbitrary SQL execution in dbx-web (authentication fails open when no password is configured)

Quick assessment

Affected
t8y2 dbx
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

dbx 是一个跨平台的数据库客户端。在版本 0.5.51 之前，dbx-web 中的认证中间件（位于 crates/dbx-web/src/auth.rs）在 password_hash 为 None 时，会将所有受保护请求都传递给处理链。在新鲜部署时，如果未设置环境变量 DBX_PASSWORD 且系统中不存在已存储的密码，就会进入这种状态。同时，crates/dbx-web/src/main.rs 默认将服务绑定到 0.0.0.0 的 4224 端口。攻击者可以在未认证的情况下调用 /api/connectio

CVSS 9.8 · Critical EPSS 0.37% · P30

Affected Version Matrix 1

VendorProduct Version RangeStatus
t8y2 dbx < 0.5.51 affected
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I. Basic Information for CVE-2026-55642

Vulnerability Information
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Vulnerability Title
dbx: Unauthenticated arbitrary SQL execution in dbx-web (authentication fails open when no password is configured)
Source: CVE Program / CVE List V5
Vulnerability Description
dbx is a cross-platform database client for databases. Prior to 0.5.51, dbx-web auth_middleware in crates/dbx-web/src/auth.rs passes every protected request to the handler chain when password_hash is None. A fresh deployment reaches that state when DBX_PASSWORD is unset and no stored password exists, while crates/dbx-web/src/main.rs binds the service to 0.0.0.0 on port 4224 by default. An unauthenticated network attacker can call the /api/connection/connect and /api/query/execute routes to use configured database credentials and execute arbitrary SQL, allowing disclosure, modification, or destruction of data in connected databases. The desktop Tauri application is not affected because it binds only to loopback. This issue is fixed in version 0.5.51.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
t8y2 dbx < 0.5.51 -

II. Public POCs for CVE-2026-55642

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 9621 chars
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III. Intelligence Information for CVE-2026-55642

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Vendor Advisories for CVE-2026-55642 (1)

Security Blog Posts for CVE-2026-55642 (1)

IV. Related Vulnerabilities

Same weakness: CWE-306

V. Comments for CVE-2026-55642

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