What’s Vulnerable › Vulnerabilities
CVE-2026-8859: Path Traversal in APIRequest Component via Content-Disposition Header
- Severity: critical (CVSS 9.9 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-07-17 · updated 2026-10-24
- Weakness: CWE-22
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
- IBM Langflow OSS: from 1.0.0 before 1.10.1 — fixed in 1.10.1
How to fix
Upgrade to a fixed version: IBM Langflow OSS 1.10.1. Check the vendor advisory for mitigations.
References
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