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.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| langchain(npm) | 0 | 0.2.19 | N/A |
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