Claude Code: Insecure System-Wide Configuration Loading Enables Local Privilege Escalation on Windows_CVE-2026-35603

{
    "lastseen": "",
    "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.",
    "published": "2026-04-17T20:38:49.901Z",
    "modified": "2026-04-17T20:38:49.901Z",
    "type": "cve",
    "title": "Claude Code: Insecure System-Wide Configuration Loading Enables Local Privilege Escalation on Windows",
    "source": "GitHub_M",
    "references": "https://github.com/anthropics/claude-code/security/advisories/GHSA-5cwg-9f6j-9jvx",
    "id": "CVE-2026-35603",
    "bulletinFamily": "",
    "cwe": [
        "CWE-426"
    ],
    "cvelist": null,
    "sourceData": "anthropics claude-code < 2.1.75",
    "sourceHref": "",
    "cvss": {
        "score": 5.4,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "claude-code",
    "version": "< 2.1.75",
    "vendor": "anthropics",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}