Auth bypass in Flowiseai Flowise
CVE-2026-30820
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.0.13, Flowise trusts any HTTP client that sets the header x-request-from: internal, allowing an authenticated tenant session to bypass all /api/v1/** authorization checks. With only a browser cookie, a low-privilege tenant can invoke internal administration endpoints (API key management, credential stores, custom function execution, etc.), effectively escalating privilege. This issue has been patched in version 3.0.13.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (47.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.001
Affected products
- Flowiseai Flowise — versions < 3.0.13
Weakness classification (CWE)
References
- github.com/FlowiseAI/Flowise/security/advisories/GHSA-wvhq-wp8g-c7vq (Exploit, Vendor Advisory)
- github.com/FlowiseAI/Flowise/releases/tag/flowise@3.0.13 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-30820?
- CVE-2026-30820 is a high-severity vulnerability in Flowiseai Flowise, classified under Incorrect Authorization. CVSS score: 8.8/10. Published 2026-03-07.
- How severe is CVE-2026-30820?
- High severity. CVSS v3 base score is 8.8 out of 10.