Sensitive Data Exposure in langflow-ai Project Creation Endpoint
CVE-2026-6598

5.3MEDIUM

Key Information:

Vendor

Langflow-ai

Status
Langflow
Vendor
CVE Published:
20 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-6598?

A security vulnerability has been identified in the langflow-ai software, specifically affecting versions up to 1.8.3. This vulnerability is located in the 'create_project/encrypt_auth_settings' function found in the 'src/backend/base/Langflow/api/v1/projects.py' file. Through the manipulation of the 'auth_settings' argument, an attacker can induce cleartext storage of sensitive information on the system, potentially leading to unauthorized access. The flaw can be exploited remotely, posing a significant risk to users. Despite early notification to the vendor, no response was received regarding this pressing security concern.

Affected Version(s)

langflow 1.8.0

langflow 1.8.1

langflow 1.8.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-6598 - Proof of Concept

References

https://vuldb.com/vuln/358233
vdb-entrytechnical-description
https://vuldb.com/vuln/358233/cti
signaturepermissions-required
https://vuldb.com/submit/791921
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Eric-f (VulDB User)
VulDB CNA Team
.