Attackers are exploiting CVE-2026-5027 in Langflow to write arbitrary files on exposed servers by abusing a path traversal flaw in the file upload endpoint. Researchers say unauthenticated access makes exploitation easier, and users should upgrade to the latest patched release. #CVE-2026-5027 #Langflow #Tenable #Snyk #VulnCheck #CaitlinCondon #Censys
Keypoints
- Attackers are exploiting CVE-2026-5027 in Langflow.
- The flaw allows arbitrary file writes through path traversal in file uploads.
- The vulnerable /api/v2/files endpoint fails to sanitize the filename parameter.
- Langflow’s default unauthenticated auto-login can let attackers reach the endpoint without credentials.
- Users are advised to upgrade to Langflow version 1.10.0.