#cve-2026-5027 Tech News.
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Attackers are actively exploiting CVE-2026-5027, a high-severity path traversal vulnerability in Langflow's file upload endpoint. The flaw allows writing arbitrary files on exposed servers. Tenable discovered the issue and disclosed it on March 27, 2026. A patch was released in Langflow version 1.9.0.
CVE-2026-5027, a path traversal vulnerability in Langflow with a CVSS score of 8.8, is being actively exploited for unauthenticated remote code execution. The flaw allows attackers to write files to arbitrary locations via the POST /api/v2/files endpoint. Approximately 7,000 Langflow instances are publicly exposed, mostly in North America.
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