Auth bypass in Flowiseai Flowise
CVE-2026-71962
Flowise versions 2.2.4 through 3.1.4 contain a missing authorization vulnerability in the POST /api/v1/openai-assistants-file/download endpoint that allows unauthenticated attackers to access private files by exploiting the endpoint's inclusion in the global authentication whitelist, which bypasses all session and API key verification. Attackers can supply valid chatflowId, chatId, and fileName identifiers to retrieve files from any chatflow on the instance, including private chatflows belonging to other workspaces or organizations.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.007 (50.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.5% 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: 0.007 · change: +0.002
Affected products
- Flowiseai Flowise — versions 2.2.4
Weakness classification (CWE)
References
- gist.github.com/haidang-infosec/402db84bee7aca2f57bb109b31574649 (Exploit, technical-description, Third Party Advisory, exploit, Mitigation)
- flowiseai.com/sunset (vendor-advisory, Not Applicable)
- www.vulncheck.com/advisories/flowise-missing-authorization-via-openai-assistant… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-71962?
- CVE-2026-71962 is a high-severity vulnerability in Flowiseai Flowise, classified under Missing Authorization. CVSS score: 7.5/10. Published 2026-08-10.
- How severe is CVE-2026-71962?
- High severity. CVSS v3 base score is 7.5 out of 10.