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.

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 (ge…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.004 (31.4th 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
Langflow-ai Langflow — versions < 1.9.0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

security-advisories@github.com (x_refsource_CONFIRM, 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.