CVE-2026-44653Public exploitNetwork attack vector

Authenticated credential disclosure via unredacted MCP responses

Published Jun 2, 2026 · Updated Jun 2, 2026

Information disclosure in Danny Avila LibreChat before 0.8.4 allows remote authenticated users to read MCP provider credentials. ServerConfigsDB.mapDBServerToParsedConfig() decrypts admin-managed API keys and OAuth client secrets, and the MCP route handlers return that configuration without redaction. VIEW access to a shared MCP server is sufficient, exposing its backing provider credentials without owner interaction.

CVSS severity6.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Danny Avila LibreChat before 0.8.4 allows remote authenticated users to read MCP provider credentials. ServerConfigsDB.mapDBServerToParsedConfig() decrypts admin-managed API keys and OAuth client secrets, and the MCP route handlers return that configuration without redaction. VIEW access to a shared MCP server is sufficient, exposing its backing provider credentials without owner interaction.

The record

CVE
CVE-2026-44653
Published
Jun 2, 2026
Updated
Jun 2, 2026
Vendor
Danny Avila
Product
LibreChat
Classifications
CWE-201
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.8.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Danny Avila · LibreChatversion=< 0.8.4

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-201Insertion of Sensitive Information Into Sent Data

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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