CVE-2026-5027

EUVD-2026-16668
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 ('../').
Path Traversal
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.8 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 91.55%
Affected Products (NVD)
VendorProductVersion
langflowlangflow
𝑥
< 1.9.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://www.tenable.com/security/research/tra-2026-26