MEDIUM6.5

PYSEC-2026-1510

langchain vulnerable to path traversal

Quick fix

PYSEC-2026-1510 — langchain: upgrade to the fixed version with the command below.

pip install --upgrade 'langchain>=0.0.353'

Details

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/langchain

Introduced in: 0Fixed in: 0.0.353

Fixpip install --upgrade 'langchain>=0.0.353'

References

https://nvd.nist.gov/vuln/detail/CVE-2024-3571[ADVISORY]
https://github.com/langchain-ai/langchain/commit/aad3d8bd47d7f5598156ff2bdcc8f736f24a7412[WEB]
https://github.com/langchain-ai/langchain[PACKAGE]
https://huntr.com/bounties/2df3acdc-ee4f-4257-bbf8-a7de3870a9d8[WEB]
https://pypi.org/project/langchain[PACKAGE]
https://github.com/advisories/GHSA-rgp8-pm28-3759[ADVISORY]