IBM Langflow 1.0.0-1.10.3: Truncated SHA256 Authenticated Code Exec
CVE-2026-9201 Published on August 5, 2026
Langflow OSS is affected by arbitrary code execution in component generation, validation, and custom component handling
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 SHA256 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.
Vulnerability Analysis
CVE-2026-9201 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
Inadequate Encryption Strength
The software stores or transmits sensitive data using an encryption scheme that is theoretically sound, but is not strong enough for the level of protection required. A weak encryption scheme can be subjected to brute force attacks that have a reasonable chance of succeeding using current attack methods and resources.
Products Associated with CVE-2026-9201
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Affected Versions
IBM Langflow OSS:- Version 1.0.0, <= 1.10.3 is affected.