| Component | LibreChat |
| Severity | medium (CVSS 6.3) |
| CVSS vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N |
| Published (NVD) | 2026-04-07 |
| Last modified | 2026-07-24 |
| Affected versions | librechat < 0.8.4 |
| Fixed in | 0.8.4 |
| Weakness | CWE-22 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade LibreChat to
0.8.4or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
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