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TI-2026-75422 Aliases CVE-2026-111636GHSA-m82j-2j7c-gx6q

OpenBMB StaffDeck Authentication Bypass via Hard-Coded Session Secret

Priority MEDIUM 42CWE-321Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-321.

Summary

OpenBMB StaffDeck through 0.5.6 uses a hard-coded default app_secret to sign session tokens. An unauthenticated remote attacker can forge an HMAC-SHA256 token for the seeded admin user in tenant_demo and gain full tenant administration, including stored model and channel credentials. The flaw is classified as CWE-321 (use of a hard-coded cryptographic key).

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00402 34th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenBMBStaffDeckup to 0.5.6—No fix listedCNA
  • StaffDeck VendorOpenBMB Affected up to 0.5.6 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for StaffDeck.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-111636
  2. 2026-10-16 Alias added: GHSA-m82j-2j7c-gx6q
  3. 2026-10-18 CISA SSVC decision points changed
  4. 2026-10-18 Priority changed: MEDIUM → LOW
  5. 2026-10-18 Priority changed: LOW → MEDIUM

References

Advisory 1

Other 2

  • TI-2026-50949 XAgent Path Traversal Arbitrary File Read via /workspace/file CVSS 4.0HIGH 8.7
  • TI-2026-41884 OpenBMB ChatDev - Unauthenticated Path Traversal in Upload Handler Allows Arbitrary File Write and Delete CVSS 4.0HIGH 8.8
  • TI-2024-01867 OpenBMB XAgent Privileged Mode sandbox CVSS 3.1HIGH 8.8
  • TI-2026-85970 Code injection in OpenBMB Internet of Agents Code Executor Tool CVSS 4.0MEDIUM 6.9
  • TI-2026-04320 OpenBMB XAgent ShareServer WebSocket Endpoint share.py check_user missing authentication CVSS 4.0MEDIUM 6.9
  • TI-2026-03418 OpenBMB XAgent workspace.py workspace path traversal CVSS 4.0MEDIUM 6.9
See all 12 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences