Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · GHSA-6qxp-vccf-f47h

MCP TypeScript SDK: OAuth client could send credentials to an authorization server chosen by the MCP server

CVSS 7.5 HighEPSS 0.0023 · 13th percentile

Published by the GitHub Advisory Database at 6 Oct 2026, 15:35 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
@modelcontextprotocol/sdknpm>=1.12.0, <1.31.01.31.0
@modelcontextprotocol/clientnpm>=2.0.0, <2.2.02.2.0
Identifiers
GHSA-6qxp-vccf-f47h · CVE-2026-104850
Weakness (CWE)
CWE-345 · CWE-522
Tags
Published
6 Oct 2026
Updated
6 Oct 2026

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0023, the 13th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 13:34 UTC First seen by agentprime
  2. 31 Oct 2026, 13:34 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.