CVE-2026-17621: Langflow

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

IBM Langflow OSS 1.0.0 through 1.10.2 could allow a remote attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing "dot dot " sequences ( /.. /) to view arbitrary files on the system.

Affected products

• Langflow Langflow: from 1.0.0, before 1.10.3 (fixed in 1.10.3)

Published 2026-09-04. Last modified 2026-09-10.