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CVE-2026-18729

HighPublished

Langflow is affected by multiple remote code execution vulnerabilities due to insufficient code-execution policy enforcement

Published: Aug 28, 2026
Updated: Sep 1, 2026
Assigning CNA: ibm
Evidence observed: Aug 30, 2026

Primary CVSS

8.8/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

0.9%

Low · next 30 days

Percentile: 57.1%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

POC-CVE-2026-18729PoC
Proof-of-concept exploit for CVE-2026-18729 in Langflow, demonstrating remote code execution via crafted requests. Includes usage instructions and evidence of code execution.

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