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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.

skyler DBX是skyler个人开发者的一款数据库系统软件。 skyler DBX 0.5.51之前版本存在授权问题漏洞，该漏洞源于auth_middleware在password_hash为None时未正确执行身份验证，将受保护请求直接传递给处理链，可能导致未经身份验证的网络攻击者调用/api/connection/connect和/api/query/execute接口，使用配置的数据库凭据执行任意SQL，从而泄露、修改或破坏数据。

CVSS 9.8 · Critical EPSS 0.69% · P52

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
Vulnerability Title
skyler DBX 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
skyler DBX是skyler个人开发者的一款数据库系统软件。 skyler DBX 0.5.51之前版本存在授权问题漏洞，该漏洞源于auth_middleware在password_hash为None时未正确执行身份验证，将受保护请求直接传递给处理链，可能导致未经身份验证的网络攻击者调用/api/connection/connect和/api/query/execute接口，使用配置的数据库凭据执行任意SQL，从而泄露、修改或破坏数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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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