CVE-2026-42867
Langflow: Path Traversal in Knowledge Bases API via Creation Endpoint
Description
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, Langflow is vulnerable to Path Traversal in the Knowledge Bases API (POST /api/v1/knowledge_bases). This occurs because user-supplied knowledge base names are used directly to create file paths without proper sanitization or containment checks. An authenticated attacker can exploit this flaw to create directories and write files anywhere on the server's filesystem. This vulnerability is fixed in 1.9.0.
INFO
Published Date :
June 23, 2026, 4:29 p.m.
Last Modified :
June 23, 2026, 4:29 p.m.
Remotely Exploit :
No
Source :
GitHub_M
Affected Products
The following products are affected by CVE-2026-42867
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update Langflow to version 1.9.0 or later.
- Apply vendor-provided patches if available.
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CVE-2026-42867 vulnerability anywhere in the article.