Auth bypass in Langflow
CVE-2026-34046
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.5.1, the `_read_flow` helper in `src/backend/base/langflow/api/v1/flows.py` branched on the `AUTO_LOGIN` setting to decide whether to filter…
Vulnerability class: IDOR (Insecure Direct Object Reference)
EPSS: 0.001 (16.6th percentile) — read the EPSS interpretation.
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.
Affected products
- Langflow — versions 1.5.0, 1.5.1
- Langflow Langflow-base
- Langflow-ai Langflow — versions < 1.5.1
- Langflow-ai Langflow-base — versions < 0.5.1
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
Frequently asked questions
- What is CVE-2026-34046?
- CVE-2026-34046 is a high-severity vulnerability in Langflow, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.8/10. Published 2026-03-27.
- How severe is CVE-2026-34046?
- High severity. CVSS v3 base score is 8.8 out of 10.