| Component | LangChain |
| Severity | critical (CVSS 9.1) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| Published (NVD) | 2024-10-29 |
| Last modified | 2026-06-17 |
| Affected versions | langchain.js = 0.2.5 |
| Fixed in | see the vendor advisory |
| Weakness | CWE-29CWE-22 |
| CISA KEV | not listed |
NVD description
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.
What to do
- NVD lists no fixed version yet: follow the vendor advisory below and keep LangChain off the public internet until a fix ships.
- Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2024-7774
- https://github.com/langchain-ai/langchainjs/commit/a0fad77d6b569e5872bd4a9d33be0c0785e538a9
- https://huntr.com/bounties/8fe40685-b714-4191-af7a-3de5e5628cee
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