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CVE-2026-31942— LibreChat has IDOR in API Keys Management that allows any authenticated user to overwrite other users' API keys

CVSS 7.1 · High

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-31942

Vulnerability Information
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Vulnerability Title
LibreChat has IDOR in API Keys Management that allows any authenticated user to overwrite other users' API keys
Source: NVD (National Vulnerability Database)
Vulnerability Description
LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. In versions up to and including 0.7.6, an Insecure Direct Object Reference (IDOR) vulnerability exists in the API keys management endpoint (PUT /api/keys). Due to the use of the JavaScript object spread operator after setting the authenticated user's ID, any authenticated user can inject a userId parameter in the request body to overwrite any other user's API keys (e.g., OpenAI, Anthropic, Azure). This allows an attacker to replace a victim's API key configuration, potentially routing the victim's conversations through attacker-controlled keys or denying service by providing invalid keys. This is patched in version 0.8.3-rc1.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
danny-avilaLibreChat < 0.8.3-rc1 -

II. Public POCs for CVE-2026-31942

#POC DescriptionSource LinkShenlong Link
AI-Generated POCVerified env Premium
Qwen3.6-35B-A3B · 7980 chars
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III. Intelligence Information for CVE-2026-31942

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Vendor Advisories for CVE-2026-31942 (1)

Same Patch Batch · danny-avila · 2026-06-02 · 4 CVEs total

CVE-2026-326259.6 CRITICALLibreChat Exfiltrates Server Secrets via MCP Server URL Injection
CVE-2026-446536.5 MEDIUMLibreChat Shared MCP Server View Leaks Decrypted Admin Secrets
CVE-2026-44654LibreChat: Shared-agent editor can globally delete owner's file records — breaks owner's o

IV. Related Vulnerabilities

Same product: LibreChat
Same vendor: danny-avila
Same weakness: CWE-862

V. Comments for CVE-2026-31942

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