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CVE-2026-17632

HighPublished

Langflow OSS is affected by arbitrary code execution in component generation, validation, and custom component handling

Published: Aug 5, 2026
Updated: Aug 6, 2026
Assigning CNA: ibm
Evidence observed: Sep 15, 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

0.7%

Low · next 30 days

Percentile: 49.7%
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 1.10.3 could allow a remote authenticated attacker to execute arbitrary code due to improper validation of Python code during AST-based security scanning.

Sources

langflow-CVE-2026-17633-PoCPoC
PoC for CVE-2026-17633 — Authenticated RCE in IBM Langflow OSS 1.0.0–1.10.3 via custom_component endpoint. Includes CVE-2026-17632 AST scanner bypass research.

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