Vulnerability · Published Apr 7, 2026 · Assigned by GitHub_M

CVE-2026-34371LibreChat Affected by Arbitrary File Write via `execute_code` Artifact Filename Traversal

Medium 6.3

In plain English

A medium-severity path traversal in LibreChat from danny-avila. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)0.3%top 80.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
danny-avila	LibreChat	< 0.8.4

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N

References

https://github.com/danny-avila/LibreChat/security/advisories/GHSA-qrm5-r67f-6692 x_refsource_CONFIRM