File System Vulnerability in IBM Langflow OSS Software
CVE-2026-7646

6.5MEDIUM

Key Information:

Vendor

IBM
Status
Langflow Oss
Vendor
CVE Published:
5 August 2026

What is CVE-2026-7646?

IBM Langflow OSS versions 1.0.0 through 1.10.3 are subject to a vulnerability that allows unauthorized users to read arbitrary files from the server's filesystem. This flaw can be exploited by sending a specially crafted MCP resources/read request that includes a URL-encoded path traversal sequence, potentially exposing sensitive information such as other users' uploaded documents, JWT signing secrets, SQLite databases, and process environment variables.

Affected Version(s)

Langflow OSS 1.0.0 <= 1.10.3

References

https://www.ibm.com/support/pages/node/7282147
vendor-advisorypatch

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

CVEs reported to IBM: CVE-2026-8446 by odgrso (GMO CyberSecurity by Ierae, Inc.); CVE-2026-17626 by Thai Son Dinh (VinSOC Labs, (R&amp;D).
.