CVE-2026-5027
High
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 ('../').
SeverityHigh
CVSS8.8
Exploit probability—
Product
Langflow
PublishedMar 27, 2026
First seenMar 27, 2026
Weakness typeCWE-22Path traversal
How to fix
Update
- langflow langflow1.9.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| langflow langflow | v < 1.9.0 | 1.9.0 |
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