CVE-2026-89022— BookStack < 26.05.5 Authentication Bypass via Social Login Provider Confusion
Quick assessment
Affected
bookstackapp bookstack
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.
BookStack 在 26.05.5 版本之前存在一个身份验证绕过漏洞，位于其社交登录实现中。该漏洞允许未认证的攻击者通过共享相同 命名空间的不同社交提供商进行身份验证，从而以任意用户的身份登录。具体而言，攻击者可以在一个已启用的社交提供商处，使用与另一个社交提供商下某个账户相匹配的用户 ID 进行身份验证。由于 方法在查询关联的账户记录时忽略了 （驱动/提供商）列，导致系统未能正确校验凭据所属的社交提供商，从而完全绕过了身份验证机制。
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| bookstackapp | bookstack | < 26.05.5 |
affected |
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I. Basic Information for CVE-2026-89022
Vulnerability Information
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Vulnerability Title
BookStack < 26.05.5 Authentication Bypass via Social Login Provider Confusion
Source: CVE Program / CVE List V5
Vulnerability Description
BookStack before 26.05.5 contains an authentication bypass vulnerability in its social login implementation that allows unauthenticated attackers to sign in as arbitrary users by authenticating through a different social provider sharing the same driver_id namespace. Attackers can authenticate at one enabled social provider using a user ID that matches an account linked to a different social provider, bypassing credential verification entirely because the SocialAuthService::handleLoginCallback query ignores the driver column when retrieving linked account records.
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:N
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 |
|---|---|---|---|---|
| bookstackapp | bookstack | 0 ~ 26.05.5 | - |
|
II. Public POCs for CVE-2026-89022
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-89022 (1)
Security Blog Posts for CVE-2026-89022 (1)
-
🔗 BookStack Security Release v26.05.5 · BookStack vendor-advisory
IV. Related Vulnerabilities
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V. Comments for CVE-2026-89022
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