HIGH CWE-22
CVE-2026-5027
Langflow - Path Traversal Arbitrary File Write via upload_user_file
8.8/ 10
CVSS 3.1
High severity
41%
EPSS exploit odds
Chance of exploitation in the next 30 days
Higher than 99% of all CVEs
Not listed
CISA KEV catalog
No confirmed in-the-wild exploitation on CISA's list.
Timeline
- Published
- Mar 27, 2026
- Updated
- Mar 27, 2026
- First covered
- Jul 8, 2026
- Latest story
- 4 months ago
Summary
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 ('../').
CWE-22Improper Limitation of a Pathname to a Restricted Directory
Attack profile
Attack vectorNetwork
ComplexityLow
PrivilegesLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HAffected products
- langflow