What’s Vulnerable › Vulnerabilities
CVE-2026-9201: Langflow OSS is affected by arbitrary code execution in component generation, validation, and custom component handling
- Severity: high (CVSS 8.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-05 · updated 2026-10-24
- Weakness: CWE-326
Description
IBM Langflow OSS 1.0.0 through 1.10.3 could allow an authenticated attacker to execute arbitrary code due to a cryptographic weakness in the custom component validation mechanism. When the optional hardening mode that restricts execution to trusted component templates is enabled, the application validates component code using a truncated SHA‑256 hash. Because the hash comparison relies on only a portion of the digest, an attacker can craft malicious component code that collides with a trusted template hash and bypasses validation. Successful exploitation allows the attacker to introduce and execute unauthorized Python code within the Langflow process, defeating the intended security control and potentially leading to full compromise of the affected instance.
Affected products
- IBM Langflow OSS: from 1.0.0 before 1.11.0 — fixed in 1.11.0
How to fix
Upgrade to a fixed version: IBM Langflow OSS 1.11.0. Check the vendor advisory for mitigations.
References
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