What is CVE-2026-18894?

CVE-2026-18894 is a medium-severity vulnerability in IBM Langflow Oss, classified under Code Injection. CVSS score: 6.5/10. Published 2026-10-29.

How severe is CVE-2026-18894?

Medium severity. CVSS v3 base score is 6.5 out of 10.

RCE in IBM Langflow Oss

CVE-2026-18894

IBM Langflow OSS 1.0.0 through 1.12.4 could allow a remote attacker to trigger pre-existing stored Python component code in a public workflow, executing it under the flow owner's runtime context within the server process. This bypasses the intended trust boundary where public execution paths are restricted to server-trusted component code.

Vulnerability class: RCE (Remote Code Execution)

Published 2026-10-29 · last modified 2026-10-29.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

IBM Langflow Oss

Weakness classification (CWE)

CWE-94 — Code Injection

References

www.ibm.com/support/pages/node/7293016 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-18894?: CVE-2026-18894 is a medium-severity vulnerability in IBM Langflow Oss, classified under Code Injection. CVSS score: 6.5/10. Published 2026-10-29.
How severe is CVE-2026-18894?: Medium severity. CVSS v3 base score is 6.5 out of 10.