CVE-2024-7774: Langchain Langchain.js

Critical severity, CVSS 9.1. EPSS: 0.6% chance of exploitation in the next 30 days.

A path traversal vulnerability exists in the `getFullPath` method of langchain-ai/langchainjs version 0.2.5. This vulnerability allows attackers to save files anywhere in the filesystem, overwrite existing text files, read `.txt` files, and delete files. The vulnerability is exploited through the `setFileContent`, `getParsedFile`, and `mdelete` methods, which do not properly sanitize user input.

Affected products

• Langchain Langchain.js: version 0.2.5 only

Published 2024-10-29. Last modified 2026-06-17.