CVE-2026-121939— Databasement before 1.10.9 Account Takeover via OIDC Email Auto-Linking

Quick assessment

Affected

David-Crty Databasement

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.

在 1.10.9 版本之前的 Databasement 中存在一个认证绕过漏洞。该漏洞位于方法中，该方法在将 OIDC 身份与本地用户通过邮箱进行关联时，未验证字段。攻击者可以利用受害者的未验证邮箱注册一个身份提供商（Identity Provider）账户，从而以任意用户身份（包括超级管理员）登录，并在用户重置密码后依然保留访问权限。

CVSS 8.1 · High Updated Nov 05, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

Vendor	Product	Version Range	Status
David-Crty	Databasement	`< 1.10.9`	affected

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Vulnerability Information

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Vulnerability Title

Databasement before 1.10.9 Account Takeover via OIDC Email Auto-Linking

Source: CVE Program / CVE List V5

Vulnerability Description

Databasement before 1.10.9 contains an authentication bypass vulnerability in OAuthService::findOrCreateLocalUser() that links OIDC identities to local users by email without checking email_verified. Attackers can register an identity provider account with a victim's unverified email to log in as any user, including the super-admin, and retain access after password resets.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

使用欺骗进行的认证绕过

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
David-Crty	Databasement	0 ~ 1.10.9	-

II. Public POCs for CVE-2026-121939

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-121939

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Other References for CVE-2026-121939 (5)

https://github.com/David-Crty/databasement/commit/b7f4079c02b7ce3f1cf2844de182e809636c3382 patch
https://github.com/David-Crty/databasement/blob/v1.10.8/app/Services/OAuthService.php#L55-L68 technical-description
https://github.com/David-Crty/databasement/releases/tag/v1.10.9 release-notes
https://github.com/David-Crty/databasement/security/advisories/GHSA-mh6w-2cch-w8v8 vendor-advisory
https://www.vulncheck.com/advisories/databasement-before-1.10.9-account-takeover-via-oidc-email-auto-linking third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-121939

IV. Related Vulnerabilities

Same product: Databasement

Same vendor: David-Crty

Same weakness: CWE-290