EUVD Vulnerability Catalog
EUVD-2026-103058
Severity: CRITICAL
Base Score: 9.2
CVSS Version: 4.0
Vulnerability Description
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 Vector Analysis
Below is the complete, human-readable breakdown of the CVSS metric string: 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
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Attack Vector (AV): Network
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Attack Complexity (AC): High
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Attack Requirements (AT): Present
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Privileges Required (PR): None
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User Interaction (UI): None
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Vulnerability Confidentiality Impact (VC): High
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Vulnerability Integrity Impact (VI): High
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Vulnerability Availability Impact (VA): High
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Subsequent Confidentiality Impact (SC): None
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Subsequent Integrity Impact (SI): None
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Subsequent Availability Impact (SA): None
Affected Vendors & Systems
Vendor
OpenBMB
References & Advisory Links
- 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
Metadata Profile
Database Authority
European Union Agency for Cybersecurity (ENISA) EUVD
Assigner
VulnCheck
EPSS Probability
0
Known Aliases
CVE-2026-111636
GHSA-m82j-2j7c-gx6q
Published On
2026-10-16
Last Updated
2026-10-16