IBM Langflow OSS up to 1.10.0 Code Execution exec os command injection

Summaryinfo

A vulnerability, which was classified as critical, was found in IBM Langflow OSS up to 1.10.0. The impacted element is the function exec of the component Code Execution Handler. Such manipulation leads to os command injection. This vulnerability is uniquely identified as CVE-2026-9198. The attack can be launched remotely. Moreover, an exploit is present.

Detailsinfo

A vulnerability, which was classified as critical, has been found in IBM Langflow OSS up to 1.10.0. Affected by this issue is the function exec of the component Code Execution Handler. The manipulation with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

IBM Langflow OSS 1.0.0 through 1.10.0 allows unauthenticated attackers to chain /api/v1/auto_login (mints SUPERUSER tokens to any network caller) with /api/v1/validate/code (executes user code via exec()) to achieve full RCE on default Langflow deployments

The advisory is shared for download at ibm.com. This vulnerability is handled as CVE-2026-9198 since 05/21/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a exploit are known. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 08/04/2026). The MITRE ATT&CK project declares the attack technique as T1202.

It is declared as attacked. This issue was added on 08/04/2026 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 08/07/2026:

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BO

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-45236). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• IBM

Name

• Langflow OSS

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10.0

License

• commercial

Website

• Vendor: https://www.ibm.com/

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Once again VulDB remains the best source for vulnerability data.

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