What is CVE-2026-34371?

CVE-2026-34371 is a medium-severity vulnerability in Danny-Avila Librechat, classified under Path Traversal. CVSS score: 6.3/10. Published 2026-04-07.

How severe is CVE-2026-34371?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Path Traversal in Danny-Avila Librechat

CVE-2026-34371

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.

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.003 (17.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N.

Affected products

Danny-avila Librechat — versions < 0.8.4
Librechat

Weakness classification (CWE)

CWE-22 — Path Traversal

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-34371?: CVE-2026-34371 is a medium-severity vulnerability in Danny-Avila Librechat, classified under Path Traversal. CVSS score: 6.3/10. Published 2026-04-07.
How severe is CVE-2026-34371?: Medium severity. CVSS v3 base score is 6.3 out of 10.