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Claude Code: Sandbox Escape via Symlink Following Allows Arbitrary File Write Outside Workspace

Collected exploitation and prediction evidence

Risk source coverage

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

Dated risk observations

Risk history is separate from CNA/OSV content history. Daily score drift is retained but only an upward crossing of 10% triggers the prediction change event.

Immutable source observations

7 recorded revisions

Each citation identifies one complete source statement. Source modification dates and the time this installation observed them are distinct. Latest history includes records historically associated by source identifiers; a removed alias is not a current equivalence claim. Exact citations show that source record's own earlier observations. Failed reads and unchanged polls do not rewrite history.

1 Nov 2026 06:14:29 UTC

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…

euvd · EUVD-2026-24033 · Published

30 Oct 2026 05:58:36 UTC

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…

euvd · EUVD-2026-24033 · Published

28 Oct 2026 05:00:06 UTC

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…

euvd · EUVD-2026-24033 · Published

27 Oct 2026 10:09:56 UTC

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…

nvd · CVE-2026-39861 · Published

25 Oct 2026 09:17:24 UTC

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…

nvd · CVE-2026-39861 · Published

24 Oct 2026 13:17:17 UTC

Claude Code: Sandbox Escape via Symlink Following Allows Arbitrary File Write Outside Workspace

osv · GHSA-vp62-r36r-9xqp · Published

23 Oct 2026 15:48:27 UTC

Claude Code: Sandbox Escape via Symlink Following Allows Arbitrary File Write Outside Workspace

cve-program · CVE-2026-39861 · Published

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 1 Nov 14:06 UTC · 275 of 275 readable · 271 fully read · documentation 469/469 current