---
id: "CVE-2026-88755"
kind: "vulnerability"
aliases: ["CVE-2026-88755"]
title: "Z.ai ZCode: opening a crafted repository auto-connects to attacker MCP servers"
severity: "high"
cvss: 7.8
epss: null
exploited: false
status: "open"
category: "ai-tooling"
products: []
ecosystems: []
tags: ["ai-tooling", "claude-code", "developer-workstations", "mcp", "zcode"]
not_affected_if: ["no-untrusted-repos", "other-ai-editors"]
published_at: "2026-10-16T15:17:33+00:00"
first_seen_at: "2026-10-23T21:57:13+00:00"
updated_at: "2026-10-25T03:10:19+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-88755", "first_seen_at": "2026-10-23T21:57:13+00:00"}]
---

# Z.ai ZCode: opening a crafted repository auto-connects to attacker MCP servers

ZCode v3.11.2.6792 automatically connects to MCP servers declared in a repository's workspace configuration without asking. A crafted repository can therefore lead an attacker to execute arbitrary code on the developer's machine when it is opened.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed ZCode version in the app's About dialog or package metadata and compare it with `3.11.2.6792`
- Review the workspace configuration files in opened repositories for MCP server declarations that were not added by your team

## Fix

- Move ZCode off `3.11.2.6792` to a newer release once the vendor publishes one; the sources do not name a fixed version
- Do not open untrusted repositories in ZCode until a fixed build is installed

## Timeline

- 2026-10-23T21:57:13+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-88755

## From the sources

Z.ai ZCode v3.11.2.6792 was discovered to automatically establish connections with MCP servers declared inside a repository's workspace configuration, possibly allowing attackers to execute arbitrary code via opening a crafted repository.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_