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.
Metrics
Affected Vendors & Products
References
History
Thu, 01 Oct 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:bookstackapp:bookstack:*:*:*:*:*:*:*:* |
Tue, 15 Sep 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Tue, 15 Sep 2026 18:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Bookstackapp
Bookstackapp bookstack |
|
| Vendors & Products |
Bookstackapp
Bookstackapp bookstack |
Tue, 15 Sep 2026 16:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | BookStack < 26.05.5 Authentication Bypass via Social Login Provider Confusion | |
| Weaknesses | CWE-290 | |
| References |
| |
| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-09-15T16:11:56.151Z
Updated: 2026-10-01T15:21:50.290Z
Reserved: 2026-09-10T16:23:54.471Z
Link: CVE-2026-89022
Updated: 2026-09-15T19:04:42.582Z
Status : Deferred
Published: 2026-09-15T17:17:33.360
Modified: 2026-09-16T19:47:01.197
Link: CVE-2026-89022
No data.