langchain-ai/langchain is vulnerable to path traversal due to improper limitation of a pathname to a restricted directory ('Path Traversal') in its LocalFileStore functionality. An attacker can leverage this vulnerability to read or write files anywhere on the filesystem, potentially leading to information disclosure or remote code execution. The issue lies in the handling of file paths in the mset and mget methods, where user-supplied input is not adequately sanitized, allowing directory traversal sequences to reach unintended directories.
Why This Matters
The evidence matters to defenders using langchain because it may disclose information available to affected deployments.
Recommended Action
Confirm whether langchain is present in your environment and review vendor guidance for this report. Apply available patches or mitigations if your deployment matches the described conditions.