fix(config): reject path traversal in policy_bundle_path and catalog_path (CONF-004) - #224
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…path (CONF-004) Closes #182. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
policy_bundle_pathandcatalog_pathfrom the config YAML were used without sanitization — an operator or env-injection attack could supply../../etc/passwdto make the gateway attempt loading arbitrary filesystem paths_check_no_traversal()that rejects any path containing..components (both POSIX and Windows path parsing)CMCP_POLICY_HASH,CMCP_CATALOG_HASH) provides a second layer of protection in productionFixes #182.
Test plan
pytest tests/unit/test_config.py— all 14 pass including 4 new CONF-004 testspytestfull suite — no regressions