CVE-2026-34371 — LibreChat Affected by Arbitrary File Write via `execute_code` Artifact Filename Traversal
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 artifa…
Published: 2026-04-07 · CVSS: 6.3 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7