What is CVE-2026-7803?

CVE-2026-7803 is a critical-severity vulnerability in IBM Langflow Oss, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2026-06-30.

How severe is CVE-2026-7803?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Improper input validation in IBM Langflow Oss

CVE-2026-7803

IBM Langflow OSS 1.0.0 through 1.10.0 could allow arbitrary code execution due to improper validation of flow nodes with missing or empty component type fields.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2026-06-30 · last modified 2026-07-02.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (48.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

IBM Langflow Oss — versions 1.0.0
Langflow

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.ibm.com/support/pages/node/7278445 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-7803?: CVE-2026-7803 is a critical-severity vulnerability in IBM Langflow Oss, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2026-06-30.
How severe is CVE-2026-7803?: Critical severity. CVSS v3 base score is 9.8 out of 10.