Auth bypass in Coze-Dev Coze-Studio
CVE-2026-77935
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/coze-dev/coze-studio/blob/72cecff858a5a18662c5d9d1a4764c53ebc98317/b… (technical-description)
- www.lasso.security/vulnerability-database/cve-2026-77935 (technical-description, exploit)
- www.vulncheck.com/advisories/coze-studio-through-0.5.1-cross-space-workflow-ido… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-77935?
- CVE-2026-77935 is a high-severity vulnerability in Coze-Dev Coze-Studio, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.3/10. Published 2026-10-20.
- How severe is CVE-2026-77935?
- High severity. CVSS v3 base score is 8.3 out of 10.