CVE-2026-31951: librechat

csirt@kutim:~/threat-intel/cve/CVE-2026-31951

CVSS 5.7 · Medium EPSS 0,35%

Kerentanan Exposure of Sensitive Information to an Unauthorized Actor pada librechat. Skor CVSS 3.1 5.7 (Medium) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD: 27 Maret 2026
Terakhir diubah: 17 Juni 2026
Status NVD: Analyzed
CVSS 3.1: 5.7 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
EPSS (30 hari): 0,35% peluang dieksploitasi; lebih tinggi dari 27,1% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
librechat	librechat	Versi 0.8.2 hingga sebelum 0.8.3
librechat	librechat	Versi 0.8.3 rc1

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://github.com/danny-avila/LibreChat/security/advisories/GHSA-pmw7-gqwj-f954 exploit · advisory vendor

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:11 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.