GHSA-5cwg-9f6j-9jvx
Suggest an improvement- Source
- https://github.com/advisories/GHSA-5cwg-9f6j-9jvx
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-5cwg-9f6j-9jvx/GHSA-5cwg-9f6j-9jvx.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-5cwg-9f6j-9jvx
- Aliases
-
- CVE-2026-35603
- Published
- 2026-04-17T22:19:38Z
- Modified
- 2026-05-05T16:04:01.752628Z
- Severity
-
- 7.3 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
- 5.4 (Medium) CVSS_V4 - 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 CVSS Calculator
- Summary
- Claude Code: Insecure System-Wide Configuration Loading Enables Local Privilege Escalation on Windows
- Details
-
On Windows, Claude Code loaded system-wide default configuration from
C:\ProgramData\ClaudeCode\managed-settings.jsonwithout validating directory ownership or access permissions. Because theProgramDatadirectory is writable by non-administrative users by default and theClaudeCodesubdirectory 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.Users on standard Claude Code auto-update have received this fix already. Users performing manual updates are advised to update to the latest version.
Thank you to hackerone.com/edbr for reporting this issue.
- Database specific
{ "github_reviewed_at": "2026-04-17T22:19:38Z", "nvd_published_at": "2026-04-17T21:16:33Z", "cwe_ids": [ "CWE-426" ], "severity": "MODERATE", "github_reviewed": true }- References
Affected packages
npm / @anthropic-ai/claude-code
Package
- Name
- @anthropic-ai/claude-code
- View open source insights on deps.dev
- Purl
- pkg:npm/%40anthropic-ai/claude-code