{"id":"CVE-2026-89022","revision":"1d6ffa5536d948d4a79f0db6393e789b","records":[{"revision":"1d6ffa5536d948d4a79f0db6393e789b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89022","aliases":[],"title":"BookStack < 26.05.5 Authentication Bypass via Social Login Provider Confusion","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.","state":0,"publishedAt":"2026-09-15T16:11:56.151+00:00","modifiedAt":"2026-10-01T15:21:50.29+00:00","affected":[{"ecosystem":"Vendor product","name":"bookstack","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"vendor\": \"bookstackapp\",\n                    \"product\": \"bookstack\",\n                    \"packageURL\": \"pkg:github/bookstackapp/bookstack\",\n                    \"repo\": \"https://github.com/bookstackapp/bookstack\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"versionType\": \"custom\",\n                            \"lessThan\": \"26.05.5\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","score":9.1,"severity":"CRITICAL"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","score":7.4,"severity":"HIGH"}],"references":["https://www.bookstackapp.com/blog/bookstack-release-v26-05-5/","https://www.vulncheck.com/advisories/bookstack-authentication-bypass-via-social-login-provider-confusion"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89022","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89022","identifiers":["CVE-2026-89022"]},"retained":false,"historicalAffected":[]}],"coverage":[]}