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

Medium 6.3 Published 7 Apr 2026 Updated 8 Apr 2026

Attackers can write arbitrary files via path traversal in artifact filenames, potentially leading to code execution or data modification.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-34371?

CVE-2026-34371 is a medium-severity path traversal vulnerability in Librechat Librechat, published on 7 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

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.

Weakness: CWE-22

Which versions are affected by CVE-2026-34371?

It affects 1 product.

Products include Librechat Librechat.

How do I fix CVE-2026-34371?

No fix has been published for CVE-2026-34371 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2026-34371 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34371 exists.

All Librechat Librechat vulnerabilities

Sources

Also known as GHSA-qrm5-r67f-6692.