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CVE-2026-111636NVD
Vulnerability 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 for the seeded 'admin' user in 'tenant_demo' to gain full tenant administration, including stored model and channel credentials.
CVSS v4.0 Base Metrics — Score 9.2 (CRITICAL)
Attack VectorNetwork
Attack ComplexityHigh
Attack RequirementsPresent
Privileges RequiredNone
User InteractionNone
Confidentiality (Vulnerable System)High
Integrity (Vulnerable System)High
Availability (Vulnerable System)High
Confidentiality (Subsequent System)None
Integrity (Subsequent System)None
Availability (Subsequent System)None
CVSS v3.1 Base Metrics — Score 8.1 (HIGH)
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Affected & Patched Versions
- OpenBMB StaffDeck <= 0.5.6
- OpenBMB StaffDeck 0.5.6
External References
- https://hackmd.io/@hieuPenguinnn/staffdeck-default-token-signing-secret-auth-bypass
- https://github.com/OpenBMB/StaffDeck/blob/v0.5.6/backend/app/config.py#L10
- https://github.com/OpenBMB/StaffDeck/blob/v0.5.6/backend/app/security/auth.py#L96-L98
- https://www.vulncheck.com/advisories/openbmb-staffdeck-through-0.5.6-authentication-bypass-via-hard-coded-session-secret