CVE-2026-34371
Description
LibreChat is a ChatGPT clone with additional features. Prior to 0.8.4, LibreChat trusts the name field returned by the execute_code sandbox when persisting code-generated artifacts. On deployments using the default local file strategy, a malicious artifact filename containing traversal sequences (for example, ../../../../../app/client/dist/poc.txt) is concatenated into the server-side destination path and written with fs.writeFileSync() without sanitization. This gives any user who can trigger execute_code an arbitrary file write primitive as the LibreChat server user. This vulnerability is fixed in 0.8.4.
How to fix
- librechat librechat0.8.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| librechat librechat | v < 0.8.4 | 0.8.4 |
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