CVE-2026-89022

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.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://www.bookstackapp.com/blog/bookstack-release-v26-05-5/
https://www.vulncheck.com/advisories/bookstack-authentication-bypass-via-social-login-provider-confusion

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-15 17:17

Updated : 2026-09-15 19:17

NVD link : CVE-2026-89022

Mitre link : CVE-2026-89022

CVE.ORG link : CVE-2026-89022

JSON object : View

Products Affected

No product.

CWE

CWE-290

Authentication Bypass by Spoofing

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