CriticalVulnerabilityLLM-specific

CVE-2026-32625: LibreChat MCP server integration leaks secrets via user-supplied URLs

Source: NVD(opens in a new tab)
Identifier: CVE-2026-32625
Published: June 2, 2026
Record updated: October 26, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 2.8%

Summary

LibreChat versions up to and including 0.8.3 resolve ${VAR} placeholders against the server's process.env during Zod schema validation of user-supplied MCP server URLs. An authenticated user can submit an MCP server configuration pointing to an attacker-controlled domain, causing the server to transmit secrets such as CREDS_KEY, CREDS_IV, JWT_SECRET and MONGO_URI in the request URL, without administrative privileges.

Mitigation

Fixed in 0.8.4-rc1.

Details

Scores and exploitation

CVSS score: 9.6(critical)
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Attack vector: network
Attack complexity: low
Privileges required: low
User interaction: none
EPSS: 2.8%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 5, 2026.
Disclosure date: June 2, 2026

Weaknesses and techniques

Weakness (CWE): CWE-200
Attack pattern (CAPEC): CAPEC-116
AI threat technique (MITRE ATLAS): AML.T0010

Classification

Attack type: Supply chain,
Other
Attack sophistication: Trivial
AI component targeted: Plugin
Impact: Confidentiality,
Integrity
Labels: security,
industry

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-32625

First tracked: June 2, 2026 at 08:09 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 90% (self-assessed)

Topics

Model Context Protocol

Summary

Mitigation

Topics

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