CVE-2026-111636CWE-321

CVE-2026-111636

High · published October 16, 2026

CVSS v3.1
8.1
EPSS
0%
Percentile
33.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
9.2 · 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
EPSS
0.00402 · 33.3th percentile
Weakness
CWE-321 · Use of Hard-coded Cryptographic Key
Published
2026-10-16T22:17Z
References (4)
https://github.com/OpenBMB/StaffDeck/blob/v0.5.6/backend/app/config.py#L10 · [email protected]https://github.com/OpenBMB/StaffDeck/blob/v0.5.6/backend/app/security/auth.py#L96-L98 · [email protected]https://hackmd.io/@hieuPenguinnn/staffdeck-default-token-signing-secret-auth-bypass · [email protected]https://www.vulncheck.com/advisories/openbmb-staffdeck-through-0.5.6-authentication-bypass-via-hard-coded-session-secret · [email protected]
EPSS history
Timeline
  • 18 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 16 OCT 17:39Z
    OpenBMB StaffDeck through 0.5.6 Authentication Bypass via Hard-Coded Session Secret
    cvelistv5
  • 16 OCT 17:39Z
    OpenBMB StaffDeck through 0.5.6 Authentication Bypass via Hard-Coded Session Secret
    cvelistv5