Vulnerability details
CVE-2026-111636
OpenBMB StaffDeck
OpenBMB StaffDeck through 0.5.6 Authentication Bypass via Hard-Coded Session Secret
CVSS 4.0
9.2Critical
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.2Critical | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | 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 |
| 8.1High | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| OpenBMB | StaffDeck | v ≤ 0.5.6 | CVEProject cvelistV5 (CNA) |
References and advisories
4- 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
- https://www.vulncheck.com/advisories/openbmb-staffdeck-through-0.5.6-authentication-bypass-via-hard-coded-session-secret third-party-advisory
Kolun on Telegram @kolunsec
Exploited CVEs, key news and a daily digest
Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.
Details
- Published
- 2026-10-16
- Last updated
- 2026-10-17
- State
- Published
- Assigner (CNA)
- VulnCheck
- Kolun priority
- 23 · Low
Exploit prediction (EPSS)
0.4%
Probability of exploitation in 30 days
34.7%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-321Use of Hard-coded Cryptographic Key