Vulnerability Report

CVE-2026-5027

Title: Path Traversal in filename parameter

Arbitrary File Access

Proof Of Concept

PoC Available for CVE-2026-5027

CWE Category CWE-22
Published Date Mar 27, 2026
Modified Date Aug 18, 2026
Exploit Status Available
Score 8.8 CVSS v3.1
Exploit Probability (EPSS)
4.76%

Vulnerability Summary

CVE-2026-5027: 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 ('../').

Impacted Vendors

L
langflow 1

Reference Links

https://www.tenable.com/security/research/tra-2026-26
CVSS v3.1
Source Entity [email protected]
Severity HIGH
8.8
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-5027 Exploits & PoCs (Proof Of Concept)

Exploit-DB https://www.exploit-db.com/exploits/52659
View Code
GitHub https://github.com/yahiahamza/CVE-2026-5027
View Code
GitHub https://github.com/EQSTLab/CVE-2026-5027
View Code
GitHub https://github.com/min8282/CVE-2026-5027
View Code
MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.