CVE-2026-9198: IBM Langflow OSS remote code execution via auto-login bypass

CVE-2026-9198 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2026-07-17

IBM Langflow, a visual framework for building multi-agent AI applications, contains a critical vulnerability that allows unauthorized individuals to take complete control of the server. By exploiting a flaw in how the system handles logins and code validation, an attacker can remotely execute commands without needing a username or password. This could lead to the theft of sensitive AI models, data exposure, or a total shutdown of the AI development environment.

Technologies: IBM Langflow OSS. Vendors: IBM.

Quick answers

Is CVE-2026-9198 exploited in the wild?
Yes. CVE-2026-9198 is known to be exploited in the wild, first recorded on 4 August 2026. Treat it as urgent.
How severe is CVE-2026-9198?
Critical severity, with a CVSS score of 9.8, published 17 July 2026.
Which products and versions are affected?
IBM Langflow OSS 1.0.0 through 1.10.0.
Is there a fix for CVE-2026-9198?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-9198 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-9198?
Check whether you run IBM Langflow OSS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A critical remote code execution (RCE) vulnerability exists in IBM Langflow OSS versions 1.0.0 through 1.10.0 due to an insecure API chain. An unauthenticated attacker can first call the `/api/v1/auto_login` endpoint, which incorrectly grants SUPERUSER tokens to any network requester. The attacker can then use this elevated privilege to access the `/api/v1/validate/code` endpoint, which utilizes the Python `exec()` function to process user-supplied input. This combination allows for arbitrary code execution on the underlying host. The vulnerability is present in default deployments and has been reported as exploited in the wild.

Affected products

  • IBM Langflow OSS 1.0.0 through 1.10.0

Timeline

  • 2026-07-17: disclosed: Initial report from IBM Corporation
  • 2026-08-04: advisory: NVD publication date
  • 2026-08-04: exploited: Reported as exploited in the wild in advisory summary

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