CVE-2026-54030
| Summary |
LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.5, LibreChat's MCP OAuth implementation does not validate that the resource parameter from OAuth Protected Resource metadata (RFC 9728) matches the configured MCP server URL, allowing a malicious MCP server to steal access tokens intended for a legitimate server. This vulnerability is fixed in 0.8.5.
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| Publication Date |
June 26, 2026, 2:16 a.m. |
| Registration Date |
June 27, 2026, 4:29 a.m. |
| Last Update |
June 26, 2026, 11:16 a.m. |
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CVSS3.1 : HIGH
|
| スコア |
8.0
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| Vector |
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N |
| 攻撃元区分(AV) |
ネットワーク |
| 攻撃条件の複雑さ(AC) |
高 |
| 攻撃に必要な特権レベル(PR) |
不要 |
| 利用者の関与(UI) |
要 |
| 影響の想定範囲(S) |
変更あり |
| 機密性への影響(C) |
高 |
| 完全性への影響(I) |
高 |
| 可用性への影響(A) |
なし |
Related information, measures and tools
Common Vulnerabilities List