Unpatched Langflow Vulnerability CVE-2026-5027 Exposed to Remote Exploitation

A critical unpatched flaw in the Langflow platform is being actively exploited, raising significant cybersecurity concerns.

Key Points:

• CVE-2026-5027 is a high-severity vulnerability with a CVSS score of 8.8.
• Attackers can exploit the flaw to perform unauthenticated remote code execution.
• Approximately 7,000 Langflow instances are publicly accessible, mainly in North America.

The Langflow security flaw, CVE-2026-5027, is a severe path traversal vulnerability that allows attackers to write files to any location on the filesystem through the vulnerable 'POST /api/v2/files' endpoint. Due to a lack of input sanitization on the 'filename' parameter, this loophole enables manipulation using path traversal sequences. With an 8.8 CVSS score, the breach poses substantial risk, particularly as it enables unauthenticated access to the vulnerable endpoints.

Learn More: The Hacker News

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