{"id":"CVE-2026-111636","title":"OpenBMB StaffDeck through 0.5.6 Authentication Bypass via Hard-Coded Session Secret","summary":"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 …","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-321"],"vendor":"OpenBMB","product":"StaffDeck","affected":["StaffDeck <= 0.5.6"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T20:51:52.034848Z"},"published":"2026-10-16","updated":"2026-10-16","sourceUpdated":"2026-10-16T21:19:00.346Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111636","references":[{"url":"https://hackmd.io/@hieuPenguinnn/staffdeck-default-token-signing-secret-auth-bypass"},{"url":"https://github.com/OpenBMB/StaffDeck/blob/v0.5.6/backend/app/config.py#L10"},{"url":"https://github.com/OpenBMB/StaffDeck/blob/v0.5.6/backend/app/security/auth.py#L96-L98"},{"url":"https://www.vulncheck.com/advisories/openbmb-staffdeck-through-0.5.6-authentication-bypass-via-hard-coded-session-secret","label":"VulnCheck Advisory: OpenBMB StaffDeck through 0.5.6 Authentication Bypass via Hard-Coded Session Secret"}],"tags":["cve.org"],"ingestedAt":"2026-10-16T18:43:08.684Z","slug":"CVE-2026-111636","body":"## Overview\n\nOpenBMB 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.\n\n## Affected\n\n- `StaffDeck <= 0.5.6`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}