Unrated severityNVD Advisory· Published Jul 17, 2026· Updated Jul 23, 2026
Path Traversal in APIRequest Component via Content-Disposition Header
CVE-2026-8859
Description
IBM Langflow OSS 1.0.0 through 1.10.0 Langflow could allow an attacker to write arbitrary files to unintended locations due to improper input validation in the APIRequest component. A path traversal vulnerability exists when the "Save to File" feature is enabled, where filenames extracted from HTTP response Content-Disposition headers are not sanitized before being joined to the temporary directory path. An attacker controlling an external HTTP server can supply crafted filename values containing path traversal sequences (e.g., ../), enabling arbitrary file writes to locations accessible by the Langflow process.
Affected products
1- Range: 1.0.0 - 1.10.0
Patches
Vulnerability mechanics
References
1- www.ibm.com/support/pages/node/7278924mitrevendor-advisorypatch
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