{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-89022 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-89022 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-89022 is a critical authentication bypass vulnerability in bookstackapp bookstack, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-89022 and fix it if it is affected.\n\nWhat it is: CVE-2026-89022 is a critical authentication bypass vulnerability in bookstackapp bookstack, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-89022 in the wild and no public exploit code.\n\nAffected product: bookstackapp bookstack. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-89022/ (Markdown: https://insights.sbomify.com/CVE-2026-89022/index.md)","id":"CVE-2026-89022","markdown":"https://insights.sbomify.com/CVE-2026-89022/index.md","name":"CVE-2026-89022","record":{"aliases":["GHSA-54r8-f2jx-5qj6"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["account_takeover"],"network_reachable":"yes","non_default_config":true,"product_category":"BookStack documentation","requires_auth":"none","summary":"Unauthenticated attackers can bypass authentication and sign in as arbitrary users by exploiting social login provider confusion in BookStack.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9.1,"severity":"critical","source":"cna","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","version":"4.0"},"cwes":[{"id":"CWE-290","name":"Authentication Bypass by Spoofing"}],"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"BookStack \u003c 26.05.5 Authentication Bypass via Social Login Provider Confusion","id":"CVE-2026-89022","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"ThemeAtelier Domain For Sale \u003c 3.5.2 Missing Authorization via REST API","id":"CVE-2026-89023"},"packages":[],"prev":{"headline":"MikroTik RouterOS Path Traversal via Container OCI/tar Image Extraction","id":"CVE-2026-89021"},"products":["bookstack"],"published":"2026-09-15","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-01","vendors":["bookstackapp"]},"summary":"Unauthenticated attackers can bypass authentication and sign in as arbitrary users by exploiting social login provider confusion in BookStack.","url":"https://insights.sbomify.com/CVE-2026-89022/"}