VULNERABILITY INTELLIGENCE

CVE-2026-34371

CVSS score6.3 MEDIUM
EPSS probability0.26%
CISA KEVNot currently listed
Published2026-04-07
Last modified2026-07-24
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N

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.

Weakness classification

  • security-advisories@github.com: CWE-22

Primary references