CVE-2026-9198 IBM CVE debrief

Who should care

Organizations using IBM Langflow OSS versions 1.0.0 through 1.10.0 should prioritize patching this vulnerability to prevent potential RCE attacks. Security teams and operators managing Langflow OSS deployments need to review system configurations, assess exposure, and apply patches or mitigations.

Technical summary

The vulnerability is caused by the ability of unauthenticated attackers to chain two API endpoints, /api/v1/auto_login and /api/v1/validate/code, to achieve full RCE on default Langflow deployments. The /api/v1/auto_login endpoint mints SUPERUSER tokens to any network caller, while the /api/v1/validate/code endpoint executes user code via exec(). This allows attackers to gain full control over the system.

Defensive priority

High

Recommended defensive actions

• Apply patches or updates provided by the vendor to vulnerable systems
• Restrict access to the affected API endpoints
• Monitor for suspicious activity
• Implement additional security controls
• Conduct a thorough review of the system configuration
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-07-17T18:17:17.340Z and was last modified on 2026-07-17T18:30:38.987Z. The NVD entry is currently Undergoing Analysis. Evidence is limited to CVE and NVD details. Defenders should verify Langflow OSS version usage and review system configurations for potential exposure.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.