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CVE-2026-89022 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:7.4 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CNA: [email protected]CVSS-B:7.4 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://www.bookstackapp.com/blog/bookstack-release-v26-05-5/	[email protected]	Release NotesVendor
https://www.vulncheck.com/advisories/bookstack-authentication-bypass-via-social-login-provider-confusion	[email protected]	Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-290	Authentication Bypass by Spoofing	[email protected]

Affected Products

Product	Versions
BookStack	< 26.05.5 (semver)
CPE cpe:2.3:a:bookstackapp:bookstack:::::::: Remediation Upgrade: 26.05.5moderate efforthttps://www.bookstackapp.com/docs/admin/updates

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 15, 2026	CVE Modified	CISA-ADP
Sep 15, 2026	New CVE Received	[email protected]