---
title: "CVE-2026-77935: Coze Studio - Broken Access Control"
description: "Coze Studio <= 0.5.1 contains an insecure direct object reference vulnerability in workflow.go, letting authenticated users access and manipulate other tenants' workflows by supplying foreign workflowIDs."
url: https://panop.io/threat-heartbeat/CVE-2026-77935/
---

# CVE-2026-77935 Coze Studio - Broken Access Control

Coze Studio <= 0.5.1 contains an insecure direct object reference vulnerability in workflow.go, letting authenticated users access and manipulate other tenants' workflows by supplying foreign workflowIDs.

CVSS base score 8.3 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-77935)

## Details

Type

Broken Access Control

Impact

Information Disclosure, Data Tampering

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Published

20 October 2026

Updated

20 October 2026

Weakness

[CWE-639](https://cwe.mitre.org/data/definitions/639.html)

## Vendor fix

Update to the latest version where access control is properly enforced.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-77935](https://nvd.nist.gov/vuln/detail/CVE-2026-77935)
- [https://github.com/coze-dev/coze-studio/blob/72cecff858a5a18662c5d9d1a4764c53ebc98317/backend/application/workflow/workflow.go#L303](https://github.com/coze-dev/coze-studio/blob/72cecff858a5a18662c5d9d1a4764c53ebc98317/backend/application/workflow/workflow.go#L303)
- [https://www.lasso.security/vulnerability-database/cve-2026-77935](https://www.lasso.security/vulnerability-database/cve-2026-77935)
- [https://www.vulncheck.com/advisories/coze-studio-through-0.5.1-cross-space-workflow-idor-via-workflow-api-handlers](https://www.vulncheck.com/advisories/coze-studio-through-0.5.1-cross-space-workflow-idor-via-workflow-api-handlers)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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