GCD AI RADAR
incidents/AIR-2026-0251

MCP TypeScript SDK OAuth Client Credential Exposure Vulnerability

Attack on AI2 Disclosed vulnerabilityInfrastructure vulnerability

An OAuth client flaw in the MCP TypeScript SDK allowed a compromised MCP server to direct OAuth credentials to an arbitrary authorization server. Users were advised to update their applications to secure the SDK.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

Details

type
Attack on AI
An AI model, agent or AI-powered product was the thing exploited, abused or leaked.
categories
  • Infrastructure vulnerability
    CVEs and advisories in AI frameworks, inference servers, MCP servers, AI developer tools and hosting stacks.
owasp llm top 10
mitre atlas
no technique for these categories
Both rows are derived from the type and categories (OWASP 2025 edition, ATLAS release 2026.09), not classified per record. How
severity
2 · Disclosed vulnerability
CVE or vendor advisory, patched or patchable, no confirmed exploitation.
targets
Framework / tooling
products
MCP TypeScript SDK
incident date
6 Oct 2026
first reported
6 Oct 2026
origin
GitHub Advisory Database
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
classifier confidence
0.95 · published at or above 0.80; see the methodology
tags
CVE-2026-104850 · mcp · oauth
record
created 2026-10-18 06:33Z · updated 2026-10-18 06:33Z · json

Sources · 2

  1. 2026-10-06
    CVE-2026-104850: MCP TypeScript SDK: OAuth client could send credentials to an authorization server chosen by the MCP server
    GitHub Advisory Database · github.com/advisories/GHSA-6qxp-vccf-f47h
  2. 2026-10-06
    CVE-2026-104850: MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and clients.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-104850

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