CVE-2026-35603
HIGHClaude Code: Insecure System-Wide Configuration Loading Enables Local Privilege Escalation on Windows
Title source: cnaExploitation Summary
EIP tracks 1 public exploit for CVE-2026-35603. PoCs published by jchable.
AI-analyzed exploit summary This repository contains a detection toolkit for the Miasma/Shai-Hulud worm, including IOCs, scanning scripts, and deobfuscation tools. It does not include functional exploit code but provides comprehensive detection and analysis capabilities.
Description
Claude Code is an agentic coding tool. In versions prior to 2.1.75 on Windows, Claude Code loaded the system-wide default configuration from C:\ProgramData\ClaudeCode\managed-settings.json without validating directory ownership or access permissions. Because the ProgramData directory is writable by non-administrative users by default and the ClaudeCode subdirectory was not pre-created or access-restricted, a low-privileged local user could create this directory and place a malicious configuration file that would be automatically loaded for any user launching Claude Code on the same machine. Exploiting this would have required a shared multi-user Windows system and a victim user to launch Claude Code after the malicious configuration was placed. This issue has been fixed on version 2.1.75.
Exploits (1)
This repository contains a detection toolkit for the Miasma/Shai-Hulud worm, including IOCs, scanning scripts, and deobfuscation tools. It does not include functional exploit code but provides comprehensive detection and analysis capabilities.
References (1)
Scores
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H