IBM Langflow OSS up to 1.9.3 API Request follow_redirects server-side request forgery

Summaryinfo

A vulnerability was found in IBM Langflow OSS up to 1.9.3. It has been declared as critical. This affects an unknown part of the component API Request. Executing a manipulation of the argument follow_redirects can lead to server-side request forgery. This vulnerability is handled as CVE-2026-10129. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in IBM Langflow OSS up to 1.9.3 and classified as critical. This vulnerability affects some unknown processing of the component API Request. The manipulation of the argument follow_redirects with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

IBM Langflow OSS 1.0.0 through 1.9.3 contains a Server-Side Request Forgery (SSRF) protection bypass vulnerability in the API Request component. An authenticated attacker with low-level privileges (flow author role) can bypass SSRF protections by enabling the follow_redirects parameter and supplying a public URL that redirects to internal/localhost addresses. The vulnerability exists because the application validates only the initial URL but does not re-validate redirect destinations. This allows attackers to access internal HTTP services, localhost endpoints, cloud metadata services, and private network resources that should be unreachable when SSRF protection is enabled. Successful exploitation can lead to disclosure of sensitive information including credentials, tokens, internal API responses, and administrative panel data.

The advisory is available at ibm.com. This vulnerability was named CVE-2026-10129 since 05/29/2026. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/01/2026).

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

• IBM

Name

• Langflow OSS

Version

• 1.9.0
• 1.9.1
• 1.9.2
• 1.9.3

License

• commercial

Website

• Vendor: https://www.ibm.com/

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