aea66f53f4
* fix: sanitize filenames in upload paths to prevent path traversal (GHSA-v57h-5999-w7xp) Add server-side filename sanitization across all file upload endpoints to prevent path traversal sequences (../) in user-supplied filenames from being incorporated into S3 object keys. While S3 keys are flat strings and not vulnerable to filesystem traversal, this adds defense-in-depth and prevents S3 key pollution. Changes: - Add sanitize_filename() utility in path_validator.py - Sanitize filenames in get_upload_path() for FileAsset and IssueAttachment models - Sanitize name parameter in all upload view endpoints * fix: address PR review feedback on filename sanitization - Remove unused `import re` - Normalize backslashes to forward slashes before os.path.basename() so Windows-style paths (e.g. ..\..\..\evil.txt) are handled on POSIX - Strip whitespace before removing leading dots so " .env" is caught - Return None instead of "unnamed" for empty input so existing `if not name` validation guards remain effective - Add `or "unnamed"` fallback at call sites that lack a name guard * fix: use random hex name as fallback in get_upload_path instead of "unnamed" * fix: resolve ruff E501 line too long in DuplicateAssetEndpoint |
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