How severe is CVE-2026-32625?

CVE-2026-32625 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-32625 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-32625?

CVE-2026-32625 affects Librechat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-32625?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-32625 have an EU (EUVD) identifier?

Yes. CVE-2026-32625 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34046.

When was CVE-2026-32625 published?

CVE-2026-32625 was published on 2026-06-02 and last updated on 2026-06-17.

CVE-2026-32625

CVE-2026-32625 is a critical-severity vulnerability in Librechat with a CVSS 3.x base score of 9.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-34046
Weakness: CWE-200
Affected product: Librechat
Published: 2026-06-02
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-32625?: CVE-2026-32625 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-32625 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-32625?: CVE-2026-32625 affects Librechat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-32625?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-32625 have an EU (EUVD) identifier?: Yes. CVE-2026-32625 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34046.
When was CVE-2026-32625 published?: CVE-2026-32625 was published on 2026-06-02 and last updated on 2026-06-17.

References

https://github.com/danny-avila/LibreChat/security/advisories/GHSA-4pcc-j6m6-wcwx

Affected products (1)

cpe:2.3:a:librechat:librechat:*:*:*:*:*:*:*:*

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