Vulnerability in Openbmb Staffdeck
CVE-2026-111636
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@hieuPenguinnn/staffdeck-default-token-signing-secret-auth-bypass (third-party-advisory)
- github.com/OpenBMB/StaffDeck/blob/v0.5.6/backend/app/config.py (technical-description)
- github.com/OpenBMB/StaffDeck/blob/v0.5.6/backend/app/security/auth.py (technical-description)
- VulnCheck Advisory: OpenBMB StaffDeck through 0.5.6 Authentication Bypass via Hard-Coded Session Secret (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111636?
- CVE-2026-111636 is a high-severity vulnerability in Openbmb Staffdeck, classified under Use of Hard-coded Cryptographic Key. CVSS score: 8.1/10. Published 2026-10-16.
- How severe is CVE-2026-111636?
- High severity. CVSS v3 base score is 8.1 out of 10.