What is CVE-2026-19298?

CVE-2026-19298 is a high-severity vulnerability in IBM Langflow Oss, classified under Code Injection. CVSS score: 8.8/10. Published 2026-09-04.

How severe is CVE-2026-19298?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in IBM Langflow Oss

CVE-2026-19298

IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote authenticated attacker to execute arbitrary code due to an authorization bypass in the flow build process.

Vulnerability class: RCE (Remote Code Execution)

Published 2026-09-04 · last modified 2026-09-10.

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 (41.6th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-94 — Code Injection

References

www.ibm.com/support/pages/node/7285640 (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-19298?: CVE-2026-19298 is a high-severity vulnerability in IBM Langflow Oss, classified under Code Injection. CVSS score: 8.8/10. Published 2026-09-04.
How severe is CVE-2026-19298?: High severity. CVSS v3 base score is 8.8 out of 10.