BookStack < 26.05.5 Authentication Bypass via Social Login Provider Confusion
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.
CVE-2026-89022
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89022
bookstack
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/bookstackapp/bookstack",
"vendor": "bookstackapp",
"product": "bookstack",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "26.05.5",
"versionType": "custom"
}
],
"packageURL": "pkg:github/bookstackapp/bookstack",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-89022
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #5583 · Revision 1
- Added to Heist Feed
- Publisher date