CVE-2026-9198

IBM Langflow OSS

Published 17 Jul 2026 · updated 17 Aug 2026 · Analyzed

9.8 Critical · CVSS 3.1, us.ibm.com

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 4 Aug 2026, with a remediation deadline of 7 Aug 2026 for US federal agencies.

Required action: 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 BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Description

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

References