CVE-2026-111636
OpenBMB StaffDeck through 0.5.6 Authentication Bypass via Hard-Coded Session Secret
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-321 |
| Vendor | openbmb |
| Product | staffdeck |
| Published | Oct 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
OpenBMB / StaffDeck
0 ≤ 0.5.6
References
hackmd.io: https://hackmd.io/@hieuPenguinnn/staffdeck-default-token-signing-secret-auth-bypass github.com: https://github.com/OpenBMB/StaffDeck/blob/v0.5.6/backend/app/config.py#L10 github.com: https://github.com/OpenBMB/StaffDeck/blob/v0.5.6/backend/app/security/auth.py#L96-L98 vulncheck.com: https://www.vulncheck.com/advisories/openbmb-staffdeck-through-0.5.6-authentication-bypass-via-hard-coded-session-secret
Credits
hieuPenguinnn