fix(csharp): prevent symlink escapes in file references#401
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sethjuarez merged 3 commits intoJul 20, 2026
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Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: 3ecadcae-f3dd-4e5f-9411-69eb69340d10
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: 3ecadcae-f3dd-4e5f-9411-69eb69340d10
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: 3ecadcae-f3dd-4e5f-9411-69eb69340d10
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| foreach (var component in components) | ||
| { | ||
| canonicalPath = Path.Combine(canonicalPath, component); |
| var root = Directory.CreateTempSubdirectory("prompty-loader-"); | ||
| try | ||
| { | ||
| var promptDir = Directory.CreateDirectory(Path.Combine(root.FullName, "prompts")); |
| try | ||
| { | ||
| var promptDir = Directory.CreateDirectory(Path.Combine(root.FullName, "prompts")); | ||
| var externalDir = Directory.CreateDirectory(Path.Combine(root.FullName, "external")); |
| { | ||
| var promptDir = Directory.CreateDirectory(Path.Combine(root.FullName, "prompts")); | ||
| var externalDir = Directory.CreateDirectory(Path.Combine(root.FullName, "external")); | ||
| File.WriteAllText(Path.Combine(externalDir.FullName, "secret.txt"), "secret"); |
| var promptDir = Directory.CreateDirectory(Path.Combine(root.FullName, "prompts")); | ||
| var externalDir = Directory.CreateDirectory(Path.Combine(root.FullName, "external")); | ||
| File.WriteAllText(Path.Combine(externalDir.FullName, "secret.txt"), "secret"); | ||
| Directory.CreateSymbolicLink(Path.Combine(promptDir.FullName, "assets"), externalDir.FullName); |
| File.WriteAllText(Path.Combine(externalDir.FullName, "secret.txt"), "secret"); | ||
| Directory.CreateSymbolicLink(Path.Combine(promptDir.FullName, "assets"), externalDir.FullName); | ||
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| var prompt = Path.Combine(promptDir.FullName, "bad.prompty"); |
| var root = Directory.CreateTempSubdirectory("prompty-loader-"); | ||
| try | ||
| { | ||
| var promptDir = Directory.CreateDirectory(Path.Combine(root.FullName, "prompts")); |
| try | ||
| { | ||
| var promptDir = Directory.CreateDirectory(Path.Combine(root.FullName, "prompts")); | ||
| var externalDir = Directory.CreateDirectory(Path.Combine(root.FullName, "external")); |
| { | ||
| var promptDir = Directory.CreateDirectory(Path.Combine(root.FullName, "prompts")); | ||
| var externalDir = Directory.CreateDirectory(Path.Combine(root.FullName, "external")); | ||
| File.WriteAllText(Path.Combine(externalDir.FullName, "secret.txt"), "secret"); |
| var promptDir = Directory.CreateDirectory(Path.Combine(root.FullName, "prompts")); | ||
| var externalDir = Directory.CreateDirectory(Path.Combine(root.FullName, "external")); | ||
| File.WriteAllText(Path.Combine(externalDir.FullName, "secret.txt"), "secret"); | ||
| Directory.CreateSymbolicLink(Path.Combine(promptDir.FullName, "assets"), externalDir.FullName); |
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Summary
Fixes GHSA-w28w-gp39-m4p6.