Fix path traversal and concurrency race conditions issues#212
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thelovekesh
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May 5, 2026
thelovekesh
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- Add validation to prevent path traversal
- Add flock while installing/uninstalling packages to avoid fs race conditions
- Remove complex locking in http caching API
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This pull request introduces workspace-level locking to prevent concurrent wpm processes and implements strict size limits for archives to mitigate security risks like zip bombs. The installer has been refactored to use a staging directory for atomic updates with rollback support, and filesystem operations now include exponential backoff for improved reliability on Windows. Additionally, the PR adds comprehensive validation for package names and project paths. Review feedback identified a discrepancy in a size limit error message, suggested adding a timeout to rollback operations, and recommended more descriptive error messages for cache metadata failures.
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