Description
The 'POST /api/v2/files' endpoint does not sanitize the 'filename' parameter from the multipart form data, allowing an attacker to write files to arbitrary locations on the filesystem using path traversal sequences ('../').
Affected products
langflow: langflow
References1
- www.tenable.com/security/research/tra-2026-26 Vendor AdvisoryThird Party Advisory
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 40% percentile: 99 · as of 12 November 2026
- CWE
- CWE-22
Could this be exploited in your environment?
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