Auth bypass in Flowiseai Flowise
CVE-2026-67621
Flowise through 3.1.4 contains a missing authorization vulnerability that allows authenticated workspace members to perform unauthorized document store operations by accessing unprotected mutation endpoints. Attackers holding only view-level permissions can send direct HTTP requests to the upsert and refresh document store routes to trigger document ingestion, refresh vector database contents, consume embedding API credits, and modify knowledge bases used by downstream chatflows.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L.
EPSS exploit prediction
EPSS: 0.004 (36.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Flowiseai Flowise — versions 0
Weakness classification (CWE)
References
- flowiseai.com/sunset (vendor-advisory, Not Applicable)
- github.com/Caycon/cve-advisories/blob/main/2026/Flowise/CVE-2026-67621.md (Exploit, technical-description, Third Party Advisory, exploit)
- www.vulncheck.com/advisories/flowise-missing-authorization-on-document-store-mu… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-67621?
- CVE-2026-67621 is a high-severity vulnerability in Flowiseai Flowise, classified under Missing Authorization. CVSS score: 7.6/10. Published 2026-08-06.
- How severe is CVE-2026-67621?
- High severity. CVSS v3 base score is 7.6 out of 10.