RCE in IBM Langflow Oss

CVE-2026-81204

IBM Langflow OSS 1.0.0 through 1.11.5 could allow a remote attacker to execute arbitrary code due to code injection during graph construction.

Vulnerability class: RCE (Remote Code Execution)

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.

Affected products

Ibm Langflow Oss

Weakness classification (CWE)

CWE-94 — Code Injection

References

psirt@us.ibm.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-81204?: CVE-2026-81204 is a critical-severity vulnerability in IBM Langflow Oss, classified under Code Injection. CVSS score: 9.8/10. Published 2026-09-10.
How severe is CVE-2026-81204?: Critical severity. CVSS v3 base score is 9.8 out of 10.