Vulnerability · Published Oct 16, 2026 · Assigned by VulnCheck
CVE-2026-111636OpenBMB StaffDeck through 0.5.6 Authentication Bypass via Hard-Coded Session Secret
High 8.1
In plain English
A high-severity security flaw in StaffDeck from OpenBMB. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).
Severity (CVSS 3.1)8.1High
Exploit odds (30 days)0.4%top 65.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-321 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://hackmd.io/@hieuPenguinnn/staffdeck-default-token-signing-secret-auth-bypass third-party-advisory
- https://github.com/OpenBMB/StaffDeck/blob/v0.5.6/backend/app/config.py#L10 technical-description
- https://github.com/OpenBMB/StaffDeck/blob/v0.5.6/backend/app/security/auth.py#L96-L98 technical-description
- VulnCheck Advisory: OpenBMB StaffDeck through 0.5.6 Authentication Bypass via Hard-Coded Session Secret third-party-advisory