Dashboard / CVE-2026-54030

CVE-2026-54030

CRITICAL
INFO Priority: 0.02 BB Relevance: 69/100
Published: 2026-06-25 Modified: 2026-10-25 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth Conf. Impact Integ. Impact Scope Change

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: Required
S: Changed
C: High
I: High
A: None

Description

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.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
librechat librechat < 0.8.4
librechat librechat 0.8.5

References & Advisories (1)

Bug Bounty Relevance

69 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

9.3 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

EPSS — Exploitation Probability

0.17%
Raw Score 0.001680
Percentile 6.0%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00168
2026-10-28
0.00168

Intelligence Sources

nvd ref →

External Links