High 8.1Published Oct 16, 2026

CVE-2026-111636OpenBMB StaffDeck through 0.5.6 Authentication Bypass via Hard-Coded Session Secret

Updated under an hour ago (Oct 28, 2026, 5:00 AM ET)

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It affects OpenBMB StaffDeck. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.40%, higher than 34% of scored CVEs.

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Every CVE for OpenBMB StaffDeck

Exploited in the last 30 days

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: 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-321
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.40% (percentile 34)
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Oct 16, 2026
First seen by InfoSec Signals: Oct 16, 2026

Affected products

Affected products

OpenBMB StaffDeck openbmb:staffdeck (from the name)	through 0.5.6	CNA record

References

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
https://www.vulncheck.com/advisories/openbmb-staffdeck-through-0.5.6-authentication-bypass-via-hard-coded-session-secret	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.