Auth bypass in Langflow
CVE-2026-33484
Langflow is a tool for building and deploying AI-powered agents and workflows. In versions 1.0.0 through 1.8.1, the `/api/v1/files/images/{flow_id}/{file_name}` endpoint serves image files without any authentication or ownership check. Any unauthenticated request with a known flow_id and file_name returns the image with HTTP 200. In a multi-tenant deployment, any attacker who can discover or guess a `flow_id` (UUIDs can be leaked through other API responses) can download any user's uploaded images without credentials. Version 1.9.0 contains a patch.
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: 0.006 (44.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.058 · newest: 0.006 · change: -0.053
Affected products
- Langflow
- Langflow-Ai Langflow — versions >= 1.0.0, < 1.9.0
Weakness classification (CWE)
References
- github.com/langflow-ai/langflow/security/advisories/GHSA-7grx-3xcx-2xv5 (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-33484?
- CVE-2026-33484 is a high-severity vulnerability in Langflow, classified under Improper Access Control. CVSS score: 7.5/10. Published 2026-03-24.
- How severe is CVE-2026-33484?
- High severity. CVSS v3 base score is 7.5 out of 10.