Description
LibreChat is a ChatGPT clone with additional features. In versions 0.8.2-rc1 through 0.8.3-rc1, user-created MCP (Model Context Protocol) servers can include arbitrary HTTP headers that undergo credential placeholder substitution. An attacker can create a malicious MCP server with headers containing `{{LIBRECHAT_OPENID_ACCESS_TOKEN}}` (and others), causing victims who call tools on that server to have their OAuth tokens exfiltrated. Version 0.8.3-rc2 fixes the issue.
Details
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| librechat | โ | โ |
References
Similar Threats
- Unknown CGA-4x8j-h8f5-r539
- Unknown CGA-4v67-j4wv-j2jf
- Unknown CGA-4wjj-gwr8-wp83
- Unknown CGA-33f9-cxc3-pfp4
- Unknown CGA-2p7j-rwc3-5x9r
Patch Gap Protection
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