Summary

• Fixes improper parsing of Content-Disposition filename parameters that violates RFC 2183 and RFC 7578
• Ensures quoted parameter values stop at the closing quote instead of continuing to parse trailing characters
• Prevents security issues where filename="payload.jpg".html was incorrectly parsed as payload.jpg.html instead of payload.jpg

Test plan

• Added test cases to reproduce the issue
• Verified the fix correctly handles improperly quoted filenames
• Ensured all existing tests continue to pass
• Added additional edge case tests for robustness