security(CASA-49): add cache-control headers to prevent caching #1036
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Add middleware to set Cache-Control: no-store, private headers on all /api/v1/ endpoints to prevent caching of sensitive data at any layer. - Add cache_control_middleware() in api/middleware.py - Register middleware in main.py middleware stack - Respects existing headers (SSE endpoints unchanged) Meets CASA-49 compliance requirements.
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felixschmetz
approved these changes
Oct 29, 2025
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Implements CASA-49 compliance by adding Cache-Control middleware to prevent caching of sensitive data.
Changes
Sets Cache-Control: no-store, private on all /api/v1/ endpoints while respecting existing SSE headers.
Compliance
Meets CASA-49 requirements for preventing caching of sensitive data in server components.
Closes ENG-187
Summary by cubic
Add middleware that sets Cache-Control: no-store, private on all API responses to prevent caching of sensitive data. Keeps existing Cache-Control headers intact (e.g., SSE) and fulfills CASA-49.