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CVE-2026-89022

BookStack < 26.05.5 Authentication Bypass via Social Login Provider Confusion PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
bookstackapp / bookstackaffected 0 before 26.05.5

CWE

CWE-290

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.