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fix: reject symlinked LocalFile sources#2972

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matthewflint wants to merge 5 commits intoopenai:mainfrom
matthewflint:fix/sandbox-localfile-symlink-rejection
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fix: reject symlinked LocalFile sources#2972
matthewflint wants to merge 5 commits intoopenai:mainfrom
matthewflint:fix/sandbox-localfile-symlink-rejection

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@matthewflint matthewflint commented Apr 20, 2026

Summary

  • route LocalFile reads through the pinned LocalDir path handling
  • reject symlinked ancestor and leaf source paths
  • revalidate fallback LocalDir parent directories before accepting opened files
  • use POSIX sandbox paths in metadata assertions so Windows runners do not compare host-rendered paths
  • add focused regression coverage

Testing

  • uv run pytest -q tests/sandbox/test_entries.py
  • uv run ruff check src/agents/sandbox/entries/artifacts.py tests/sandbox/test_entries.py

Signed-off-by: matthewflint 277024436+matthewflint@users.noreply.github.com

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Comment thread src/agents/sandbox/entries/artifacts.py Outdated
@seratch seratch marked this pull request as draft April 20, 2026 21:26
@seratch seratch changed the title Reject symlinked LocalFile sources fix: reject symlinked LocalFile sources Apr 20, 2026
@github-actions github-actions Bot added the bug Something isn't working label Apr 21, 2026
Route LocalFile reads through the same pinned path handling used by LocalDir so symlinked source paths are rejected consistently. Add focused regression coverage for symlinked ancestor and leaf paths.
Signed-off-by: matthewflint <277024436+matthewflint@users.noreply.github.com>
@matthewflint matthewflint force-pushed the fix/sandbox-localfile-symlink-rejection branch from ea303bd to 5d16cdd Compare April 21, 2026 16:31
@matthewflint matthewflint marked this pull request as ready for review April 21, 2026 16:32
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matthewflint commented Apr 21, 2026

Rebased this onto current main, tightened fallback LocalDir parent revalidation, fixed the Windows metadata assertions to expect POSIX sandbox paths, and force-pushed.

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