Insecure Direct Object Reference in Coze Studio Affects Workflow Access
CVE-2026-77935

8.7HIGH

Key Information:

Vendor

Coze-dev

Status
Coze-studio
Vendor
CVE Published:
20 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-77935?

Coze Studio, up to version 0.5.1, includes a vulnerability in the workflow.go file that permits authenticated users to exploit insecure direct object references. By manipulating workflowIDs, an attacker can gain unauthorized access to workflows belonging to other tenants. This allows potential actions such as reading, executing, overwriting, or deleting workflows associated with foreign spaceIDs. The affected API routes include save, update_meta, batch_delete, canvas, test_run, and nodeDebug, making it critical for users to assess their security posture and implement the necessary updates.

Affected Version(s)

coze-studio 0 <= 0.5.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-77935 - Proof of Concept

References

https://www.lasso.security/vulnerability-database/cve-202...
technical-descriptionexploit
https://github.com/coze-dev/coze-studio/blob/72cecff858a5...
technical-description
https://www.vulncheck.com/advisories/coze-studio-through-...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Noy Pearl
Michael Sromin
Ophir Dror
.