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.
Affected products
librechat: librechat
References2
- github.com/danny-avila/LibreChat/security/advisories/GHSA-qrm5-… ExploitVendor Advisory
- github.com/danny-avila/LibreChat/security/advisories/GHSA-qrm5-… ExploitVendor Advisory
Metrics
- CVSS 3.1
-
6.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N - EPSS — exploit probability
- 0% percentile: 19 · as of 12 November 2026
- CWE
- CWE-22
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