Claude Code is an agentic coding tool. Prior to version 2.1.64, Claude Code's sandbox did not prevent sandboxed processes from creating symlinks pointing to locations outside the workspace. When Claude Code subsequently wrote to a path with…
Exact source revision recorded 1 Nov 2026 06:14:29 UTC. It does not establish the source's current position. Latest evidence.
euvd · EUVD-2026-24033
PublishedClaude Code is an agentic coding tool. Prior to version 2.1.64, Claude Code's sandbox did not prevent sandboxed processes from creating symlinks pointing to locations outside the workspace. When Claude Code subsequently wrote to a path within such a symlink, its unsandboxed process followed the symlink and wrote to the target location outside the workspace without prompting the user for confirmation. This allowed a sandbox escape where neither the sandboxed command nor the unsandboxed app could independently write outside the workspace, but their combination could write to arbitrary locations, potentially leading to code execution outside the sandbox. Reliably exploiting this required the ability to add untrusted content into a Claude Code context window to trigger sandboxed code execution via prompt injection. Users on standard Claude Code auto-update have received this fix automatically. Users performing manual updates are advised to update to version 2.1.64 or later.
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Original publisher date fields
datePublished: Apr 21, 2026, 12:56:39 AM
dateUpdated: Apr 21, 2026, 1:44:49 PM
- Source published
- Apr 21, 2026, 12:56:39 AM (timezone not stated)
- Source modified
- Apr 21, 2026, 1:44:49 PM (timezone not stated)
- Observed here
- 1 Nov 2026 06:14:29 UTC
- Source terms
- ENISA EUVD · source terms and attribution apply
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EUVD CVSS 4.0 · 7.7 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