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Cyber Security Agency of Singapore
Alerts

Active exploitation of Critical Vulnerability in IBM Langflow OSS

6 August 2026

Attackers are actively exploiting a critical vulnerability in IBM Langflow OSS to achieve unauthenticated remote code execution (RCE). Users and administrators of affected products are advised to apply the latest security updates immediately.

Background

Langflow is an open source low-code tool for building Al agents and other Al applications. Security updates have been released to address a critical vulnerability (CVE-2026-9198) affecting IBM Langflow OSS. This vulnerability has a Common Vulnerability Scoring System (CVSS v3.1) score of 9.8 out of 10.

Impact

Successful exploitation of this code injection vulnerability could allow an unauthenticated attacker to achieve full remote code execution (RCE) on affected default Langflow deployments. 

Known Exploitation

This vulnerability is reportedly being actively exploited.

Affected Products

The vulnerability affects IBM Langflow OSS versions 1.0.0 through 1.10.0.

Recommendations

Users and administrators of affected products are advised to update to the latest versions immediately.

References

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-9198 (opens in new tab)

http://nvd.nist.gov/vuln/detail/CVE-2026-9198 (opens in new tab)

https://www.ibm.com/support/pages/node/7278927 (opens in new tab)