CVE-2026-5027 | BDVDB-2026-323352 Detail

langflow-ailangflow

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 ('../').

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

References#

https://www.tenable.com/security/research/tra-2026-26

Exploit#

No public exploit known

History#

Version 12026-03-27Record published in the CVE List.

Published

Published: 2026-03-27
Last modified: 2026-03-27

Vendor information

Vendor: langflow-ai
Product: langflow

All langflow-ai vulnerabilities

Score

8.8 High

EPSS

39.9%, Moderate

Estimated chance of exploitation in the next 30 days. EPSS percentile: 98.6.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Path Traversal

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

No version data in the source record.

Scoring System

CVSS v4.0

Not available

CVSS v3.1

8.8 High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	Low
User Interaction	None
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).