{"id":"CVE-2026-111636","summary":"OpenBMB StaffDeck through 0.5.6 Authentication Bypass via Hard-Coded Session Secret","details":"OpenBMB StaffDeck through 0.5.6 contains an authentication bypass vulnerability that allows unauthenticated attackers to forge administrator session tokens using the hard-coded default app_secret. Attackers can sign an HMAC-SHA256 token for the seeded 'admin' user in 'tenant_demo' to gain full tenant administration, including stored model and channel credentials.","modified":"2026-10-17T10:30:25.536266144Z","published":"2026-10-16T17:39:08.257Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111636.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-321"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111636.json"},{"type":"PACKAGE","url":"https://github.com/OpenBMB/StaffDeck"},{"type":"ARTICLE","url":"https://github.com/OpenBMB/StaffDeck/blob/v0.5.6/backend/app/config.py#L10"},{"type":"ARTICLE","url":"https://github.com/OpenBMB/StaffDeck/blob/v0.5.6/backend/app/security/auth.py#L96-L98"},{"type":"ADVISORY","url":"https://hackmd.io/@hieuPenguinnn/staffdeck-default-token-signing-secret-auth-bypass"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111636"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/openbmb-staffdeck-through-0.5.6-authentication-bypass-via-hard-coded-session-secret"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openbmb/staffdeck","events":[{"introduced":"0"},{"last_affected":"7adc7c84f61bd6cca13ff0380a811cbb3ae3c544"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"last_affected":"0.5.6"}]}}],"versions":["v0.5.6","v0.5.5","v0.5.4","v0.5.3","v0.5.2","v0.5.1","v0.5.0","v0.4.2","v0.4.1-beta1","v0.4.1","v0.4.0","v0.3.1-beta.5","v0.3.1-beta.4","v0.3.1-beta.2","v0.3.1-beta.3","v0.3.1-beta.1","v0.3.0","v0.2.0-beta.1","v0.2.0","v0.1.2","v0.1.1-beta.4","v0.1.1-beta.3","v0.1.1-beta.2","v0.1.1-beta.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111636.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}