Auth bypass in Langflow
CVE-2026-33053
Langflow is a tool for building and deploying AI-powered agents and workflows. In versions prior to 1.9.0, the delete_api_key_route() endpoint accepts an api_key_id path parameter and deletes it with only a generic authentication check (get_current_active_user dependency). However, the delete_api_key() CRUD function does NOT verify that the API key belongs to the current user before deletion.
Vulnerability class: IDOR (Insecure Direct Object Reference)
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: 0.005 (44.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.5% 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: 0.005 · change: +0.002
Affected products
- Langflow
- Langflow-Ai Langflow — versions < 1.9.0
Weakness classification (CWE)
References
- github.com/langflow-ai/langflow/security/advisories/GHSA-rf6x-r45m-xv3w (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-33053?
- CVE-2026-33053 is a high-severity vulnerability in Langflow, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.8/10. Published 2026-03-20.
- How severe is CVE-2026-33053?
- High severity. CVSS v3 base score is 8.8 out of 10.