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    CVE-2026-35603

    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.

    Published:Apr 17, 2026
    Last Modified:Apr 22, 2026
    EPS:Apr 17, 2026
    EPSS Score:0.00012
    CVSS Score:7.3

    Affected Products

    Vendor
    Anthropic
    Product
    Claude Code
    Vendor
    Anthropics
    Product
    Claude Code
    Vendor
    Microsoft
    Product
    Windows

    Exploits

    https://github.com/jchable/miasma-toolkit

    Common Weakness Enumeration

    CWE-426 Untrusted Search Path

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-38 Leveraging/Manipulating Configuration File Search Paths

    Related CVEs

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    CVE-2026-39861 (CVSS 7.7) — Claude Code is an agentic coding tool. Prior to version 2.1.64, Claude Code's sandbox did not prevent sandboxe…
    CVE-2026-35022 — This CVE ID has been rejected by its CVE Numbering Authority (CNA). It was determined that the -p flag behavio…
    CVE-2026-35021 — This CVE ID has been rejected by its CVE Numbering Authority (CNA). It was determined that the affected code p…
    CVE-2026-35020 — This CVE ID has been rejected by the its CVE Numbering Authority (CNA). It was determined that the attack requ…
    CVE-2026-33068 (CVSS 7.7) — Claude Code is an agentic coding tool. Versions prior to 2.1.53 resolved the permission mode from settings fil…
    CVE-2026-25725 (CVSS 7.7) — Claude Code is an agentic coding tool. Prior to version 2.1.2, Claude Code's bubblewrap sandboxing mechanism f…
    CVE-2026-25724 (CVSS 2.3) — Claude Code is an agentic coding tool. Prior to version 2.1.7, Claude Code failed to strictly enforce deny rul…
    CVE-2026-25723 (CVSS 7.7) — Claude Code is an agentic coding tool. Prior to version 2.0.55, Claude Code failed to properly validate comman…
    CVE-2026-25722 (CVSS 7.7) — Claude Code is an agentic coding tool. Prior to version 2.0.57, Claude Code failed to properly validate direct…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High