Information disclosure in Danny-Avila Librechat
CVE-2026-32625
LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. In versions up to and including 0.8.3, the Model Context Protocol (MCP) server integration resolves ${VAR} placeholders against the server's process.env during Zod schema validation of user-supplied MCP server URLs. Any authenticated user can create a malicious MCP server configuration with a URL pointing to an attacker-controlled domain containing environment variable references, causing the LibreChat server to connect to the attacker's server and transmit critical secrets such as CREDS_KEY, CREDS_IV, JWT_SECRET, and MONGO_URI in the request URL. This enables full compromise of the installation's cryptographic materials and database credentials without requiring administrative privileges. This is patched in version 0.8.4-rc1.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (34.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.029 · newest: 0.004 · change: -0.025
Affected products
- Danny-Avila Librechat — versions < 0.8.4-rc1
- Librechat
Weakness classification (CWE)
References
- github.com/danny-avila/LibreChat/security/advisories/GHSA-4pcc-j6m6-wcwx (Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-32625?
- CVE-2026-32625 is a critical-severity vulnerability in Danny-Avila Librechat, classified under Information Disclosure. CVSS score: 9.6/10. Published 2026-06-02.
- How severe is CVE-2026-32625?
- Critical severity. CVSS v3 base score is 9.6 out of 10.