CVE-2026-88755: Z.ai ZCode connects to repository-declared MCP servers

The National Vulnerability Database (NVD) records that Z.ai ZCode v3.11.2.6792 automatically connects to Model Context Protocol (MCP) servers declared in a repository's workspace configuration, which the record says may let an attacker execute arbitrary code when a crafted repository is opened.

The record

Kind

Vulnerability

Source record

CVE-2026-88755: Z.ai ZCode v3.11.2.6792 was discovered to automatically establish connections with MCP servers declared inside (National Vulnerability Database record)

Record published

2026-10-16

Posted here

2026-10-19

World

Software agents · Enterprise work agents

Controls concerned

Provenance of the actor's software and hardware C-A3; Containment and isolation C-E5

Checked

Checked against its record on 2026-10-22 by a reader who did not draft it; report verification/reports/SIG-2026-10-19-001-2026-10-22.md.

A signal's controls are the ones its record points at, the exposure; a case's controls are the ones its records show were absent or failed, so the two can differ.

Corrections

Changes to what this signal says, with the reason. Every earlier version is kept.

• 2026-10-22: Summary. Plain-language rule: abbreviations spelled out; no claim changed (CVE record CVE-2026-88755). Found by the independent reader of 22 October 2026.
  Show the change

  Before: NVD records that Z.ai ZCode v3.11.2.6792 automatically connects to MCP servers declared in a repository's workspace configuration, which the record says may let an attacker execute arbitrary code when a crafted repository is opened.

  After: The National Vulnerability Database (NVD) records that Z.ai ZCode v3.11.2.6792 automatically connects to Model Context Protocol (MCP) servers declared in a repository's workspace configuration, which the record says may let an attacker execute arbitrary code when a crafted repository is opened.
• 2026-10-22: Title. Title was a cut-off sentence; it now states the record's subject (CVE record CVE-2026-88755). Corrected 22 October 2026.
  Show the change

  Before: CVE-2026-88755: Z.ai ZCode v3.11.2.6792 was discovered to automatically establish…

  After: CVE-2026-88755: Z.ai ZCode connects to repository-declared MCP servers

What a signal is. A signal records what a primary record says; it assigns no fault. It is lighter than a case: one dated item from one record, tagged with the world, sector and controls it touches. It becomes a case when it meets the bar for one.

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