CVE-2026-121455— DbGate before 7.3.3 Missing Authorization via /connections/test and /connections/save

Quick assessment

Affected

dbgate dbgate

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

DbGate 7.3.3 之前的版本存在一个缺少授权检查的漏洞。该漏洞允许受连接限制的身份验证用户绕过 LOGIN_PERMISSIONS 机制，原因是和函数从未调用。攻击者可以向提交任意连接定义，以探测内部数据库主机；或向提交请求，以覆盖已存储的连接配置。

CVSS 5.4 · Medium Updated Nov 03, 2026

Possible ATT&CK Techniques 3 AI

T1048 · Exfiltration Over Alternative Protocol T1068 · Exploitation for Privilege Escalation T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

DbGate before 7.3.3 Missing Authorization via /connections/test and /connections/save

Source: CVE Program / CVE List V5

Vulnerability Description

DbGate before 7.3.3 contains a missing authorization vulnerability that allows connection-restricted authenticated users to bypass LOGIN_PERMISSIONS because test() and save() never call testConnectionPermission. Attackers can submit arbitrary connection definitions to POST /connections/test to probe internal database hosts, or to /connections/save to overwrite stored connections.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

授权机制缺失

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
dbgate	dbgate	0 ~ 7.3.3	-

II. Public POCs for CVE-2026-121455

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-121455

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Proof of Concept for CVE-2026-121455 (1)

🔗 GitHub - dbgate/dbgate: Database manager for MySQL, PostgreSQL, SQL Server, MongoDB, SQLite and others. Runs under Windows, Linux, Mac or as web application · GitHub Read full article product

Other References for CVE-2026-121455 (5)

https://github.com/dbgate/dbgate/blob/v7.3.2/packages/api/src/controllers/connections.js#L227-L250 technical-description
https://github.com/dbgate/dbgate/blob/v7.3.2/packages/api/src/controllers/connections.js#L372-L390 technical-description
https://github.com/dbgate/dbgate/commit/9166a987bfec patch
https://github.com/dbgate/dbgate/issues/1601 issue-tracking
https://www.vulncheck.com/advisories/dbgate-before-7.3.3-missing-authorization-via-connections-test-and-connections-save third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-121455

IV. Related Vulnerabilities

Same product: dbgate

Same vendor: dbgate

Same weakness: CWE-862