Security: Path traversal/arbitrary file write risk in parallel copy worker#468
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…sk in parall Destination paths are created using `path.join(destBase, relativePath)` without validating that `relativePath` stays within `destBase`. If `files` contains `../` segments or absolute-like traversal payloads, writes can escape the intended directory and overwrite arbitrary files. Affected files: copy-worker.js Signed-off-by: tuanaiseo <221258316+tuanaiseo@users.noreply.github.com>
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Problem
Destination paths are created using
path.join(destBase, relativePath)without validating thatrelativePathstays withindestBase. Iffilescontains../segments or absolute-like traversal payloads, writes can escape the intended directory and overwrite arbitrary files.Severity:
highFile:
src/copy-worker.jsSolution
Normalize and validate each path before copy: resolve destination (
path.resolve(destBase, relativePath)) and enforce it starts withpath.resolve(destBase) + path.sep. Reject entries that fail this check.Changes
src/copy-worker.js(modified)Testing