RCE in IBM Langflow Oss

CVE-2026-18729

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote authenticated attacker to execute arbitrary code due to improper control of generation of code.

Vulnerability class: RCE (Remote Code Execution)

Published · last modified .

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: 0.018 (77.7th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-18729: rose from 0.009 to 0.018.

EPSS over last 30 days · oldest: 0.009 · newest: 0.018 · change: +0.009

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2026-18729?
CVE-2026-18729 is a high-severity vulnerability in IBM Langflow Oss, classified under Code Injection. CVSS score: 8.8/10. Published 2026-08-28.
How severe is CVE-2026-18729?
High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2026-18729 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.