GCD AI RADAR
incidents/AIR-2026-1073

CVE-2026-44470: Claude Desktop CoworkVMService File Creation Vulnerability

Attack on AI2 Disclosed vulnerabilityInfrastructure vulnerability

The Claude Desktop app for Windows prior to version 1.3834.0 contained a vulnerability where the CoworkVMService did not validate VM bundle directories before creating files. Local users could leverage directory junctions to cause the SYSTEM-owned service to write arbitrary files.

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
Anthropic, Framework / tooling
products
Claude Desktop, Claude Code
incident date
13 May 2026
first reported
13 May 2026
origin
NVD
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
0.90 · published at or above 0.80; see the methodology
tags
CVE-2026-44470 · local-privilege-escalation · claude-desktop
record
created 2026-10-18 10:04Z · updated 2026-10-18 10:04Z · json

Sources · 1

  1. 2026-05-13
    CVE-2026-44470: The Claude Desktop app gives you Claude Code with a graphical interface built for running multiple sessions side by side.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-44470

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