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TI-2026-76665 Aliases CVE-2026-77935

Insecure direct object reference in Coze Studio workflow API

Priority HIGH 73CWE-639Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

Coze Studio through 0.5.1 contains an insecure direct object reference in its workflow handlers, which accept workflow IDs from other spaces without an ownership check. An authenticated user with low privileges can pair their own space ID with another tenant's workflow ID to read, run, overwrite or delete that workflow (CWE-639). A public exploit is linked in the references.

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

Description from the CNA

Coze Studio through 0.5.1 contains an insecure direct object reference vulnerability in workflow.go that allows authenticated users to access other spaces' workflows by supplying foreign workflowIDs. Attackers can pair their own spaceID with another tenant's workflowID in save, update_meta, batch_delete, canvas, test_run and nodeDebug routes to read, run, overwrite or delete workflows.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00412 35th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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
coze-devcoze-studioup to 0.5.1—No fix listedCNA
  • coze-studio Vendorcoze-dev Affected up to 0.5.1 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for coze-studio.

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

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-77935
  2. 2026-10-20 CISA SSVC decision points changed
  3. 2026-10-20 Priority changed: MEDIUM → HIGH

References

Exploit 1

Other 1

  • TI-2026-76664 Unsandboxed Python code runner in Coze Studio allows command execution CVSS 4.0HIGH 8.7
  • TI-2026-62536 Coze Studio through 0.5.1 Server-Side Request Forgery via Plugin CVSS 4.0HIGH 7.1
  • TI-2026-62529 Coze Studio through 0.5.1 Cross-Tenant Database Access via Workflow SQL Node CVSS 4.0HIGH 8.7

Sources

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