Skip to main content
Threat Radar animated logo
DashboardThreatsMapFeedsPricingView Plans & Pricing
reconnecting
Press slash or control plus K to focus the search. Use the arrow keys to navigate results and press enter to open a threat.
Reconnecting to live updates…
EPSS 0.1%top 97%

CVE-2026-54030: CWE-346: Origin Validation Error in danny-avila LibreChat

0
High
VulnerabilityCVE-2026-54030cvecve-2026-54030cwe-346
Published: 06/25/2026 (06/25/2026, 15:48:00 UTC)
Source: CVE Database V5
Vendor/Project: danny-avila
Product: LibreChat

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.

CVSS v3.1

Score 8.0high

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

Affected software

GitHub Actionsmore threats →ai
danny-avila/LibreChat
pkg:github/danny-avila/LibreChat
Affected versions
<0.8.5

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 07/02/2026, 22:44:06 UTC

Technical Analysis

CVE-2026-54030 describes an origin validation error (CWE-346) in danny-avila's LibreChat prior to version 0.8.5. The vulnerability arises because the MCP OAuth implementation fails to validate that the resource parameter from OAuth Protected Resource metadata (RFC 9728) corresponds to the configured MCP server URL. This allows a malicious MCP server to intercept and steal access tokens that are meant for a legitimate MCP server. The vulnerability is resolved in LibreChat version 0.8.5.

Potential Impact

Successful exploitation can lead to theft of OAuth access tokens by a malicious MCP server, resulting in complete compromise of confidentiality and integrity of the affected tokens. This could allow unauthorized access to protected resources. Availability is not impacted.

Mitigation Recommendations

Upgrade LibreChat to version 0.8.5 or later, where this vulnerability is fixed. Patch status is confirmed by the vendor stating the issue is resolved in 0.8.5. No other mitigations are specified.

Pro Console: star threats, build custom feeds, automate alerts via Slack, email & webhooks.Upgrade to Pro

Technical Details

Data Version
5.2
Assigner Short Name
GitHub_M
Date Reserved
2026-06-11T16:57:50.018Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
null

Threat ID: 6a3d5b504853345fc1337289

Added to database: 06/25/2026, 16:46:08 UTC

Last enriched: 07/02/2026, 22:44:06 UTC

Last updated: 08/10/2026, 00:41:17 UTC

Views: 65

Community Reviews

0 reviews

Crowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.

Sort by
Loading community insights…

Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.

Actions

PRO

Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.

Please log in to the Console to use AI analysis features.

Need more coverage?

Upgrade to Pro Console for AI refresh and higher limits.

For incident response and remediation, OffSeq services can help resolve threats faster.

Latest Threats

Breach by OffSeqOFFSEQFRIENDS — 25% OFF

Check if your credentials are on the dark web

Instant breach scanning across billions of leaked records. Free tier available.

Scan now
OffSeq TrainingCredly Certified

Lead Pen Test Professional

Technical5-day eLearningPECB Accredited
View courses