GHSA-5xjx-9qx6-jcrv
Suggest an improvement- Source
- https://github.com/advisories/GHSA-5xjx-9qx6-jcrv
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-5xjx-9qx6-jcrv/GHSA-5xjx-9qx6-jcrv.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-5xjx-9qx6-jcrv
- Aliases
- Published
- 2026-11-09T22:42:03Z
- Modified
- 2026-11-09T23:00:03Z
- Severity
-
- 7.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- Claude Code: TOCTOU Race in Edit Tool Allows File Writes Outside the Workspace
- Details
-
Claude Code validated Edit tool targets using point-in-time pathname and symlink resolution that was not bound to the underlying directory inodes or file descriptors. On macOS, a process running inside Claude Code's Bash sandbox could exploit the resulting time-of-check to time-of-use window by atomically swapping an in-workspace parent directory with a symlink after validation completed, causing the unsandboxed Edit implementation to overwrite an attacker-selected user-writable file outside the workspace. Exploiting this required the ability to run attacker-controlled code inside the sandbox, such as through a malicious repository or dependency script.
Users on standard Claude Code auto-update have received this fix automatically. Users performing manual updates are advised to update to the latest version.
Claude Code thanks hackerone.com/mahoraga007 (Sunder Singh) for reporting this issue.
- Database specific
{ "cwe_ids": [ "CWE-367", "CWE-59" ], "github_reviewed": true, "github_reviewed_at": "2026-11-09T22:42:03Z", "nvd_published_at": "2026-11-03T20:18:19Z", "severity": "HIGH" }- 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