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.

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.

EPSS: 0.058 (92.4th percentile) — read the EPSS interpretation.

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.

Affected products

Langflow
Langflow-ai Langflow — versions >= 1.0.0, < 1.9.0

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, 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.