CVE-2026-34371

MEDIUM 6.3

LibreChat Affected by Arbitrary File Write via `execute_code` Artifact Filename Traversal

CVSS Score

6.3

EPSS Score

0.0%

EPSS Percentile

11th

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.

CWE	CWE-22
Vendor	danny-avila
Product	librechat
Published	Apr 7, 2026
Last Updated	Apr 8, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

High

Availability

None

Affected Versions

danny-avila / LibreChat

< 0.8.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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