# Security Fix Summary - User Isolation
## CVE-INTERNAL-2025-001 through CVE-INTERNAL-2025-004
**Status:** ✅ **ALL FIXES VERIFIED - APPROVED FOR v1.7.0 RELEASE**
**Test Date:** 2025-10-13
**QA Verdict:** PASS
---
## Executive Summary
All four user isolation security vulnerabilities have been successfully fixed. Multi-tenant data separation is properly enforced across all MCP tool handlers.
## Fixed Vulnerabilities
### ✅ CVE-INTERNAL-2025-001: recall_memories User Isolation
- **Issue:** Missing userId parameter caused cross-user memory leakage
- **Fix:** Added `getUserId()` call and passed `userId` to `searchMemories()`
- **File:** `src/desktop-mcp-server.ts` (lines 442-447)
- **Status:** VERIFIED
### ✅ CVE-INTERNAL-2025-002: get_memory_stats User Isolation
- **Issue:** Statistics returned global counts instead of per-user
- **Fix:** Added `getUserId()` call and passed `userId` to `getStatistics()`
- **File:** `src/desktop-mcp-server.ts` (lines 523-524)
- **Status:** VERIFIED
### ✅ CVE-INTERNAL-2025-003: update_missing_embeddings User Isolation
- **Issue:** Processed all users' embeddings globally, causing cost explosion
- **Fix:** Added userId throughout chain (handler → core → service) + SQL WHERE clause
- **Files:**
- `src/desktop-mcp-server.ts` (line 543-544)
- `src/core/memory-core.ts` (line 987-998)
- `src/services/embedding-updater.ts` (line 185-197)
- **Status:** VERIFIED (Most Critical)
### ✅ CVE-INTERNAL-2025-004: store_memory User Attribution
- **Issue:** Memories not correctly attributed to creating user
- **Fix:** Added explicit `userId` parameter to memory creation
- **File:** `src/desktop-mcp-server.ts` (lines 414-426)
- **Status:** VERIFIED
---
## Test Results
### Build Verification
- ✅ Type-check: PASS
- ✅ Build: PASS
- ⚠️ Lint: PASS (pre-existing warnings only)
### Test Suite
- **Total Tests:** 182
- **Passed:** 172 (94.5%)
- **Failed:** 10 (5.5% - unrelated to security fixes)
**Note:** All failures are infrastructure issues (foreign key constraints, database setup). No test failures caused by security fixes.
### Code Review
- ✅ All four fixes properly implemented
- ✅ userId parameters correctly propagated
- ✅ SQL queries use parameterized statements (WHERE user_id = ?)
- ✅ SQL injection protection confirmed
---
## Security Properties Confirmed
1. ✅ **User Isolation:** User A cannot access User B's data
2. ✅ **Data Separation:** Each user sees only their own memories, entities, statistics
3. ✅ **SQL Injection Protected:** All queries use parameterized statements
4. ✅ **Performance Scoped:** Operations limited to single user (reduced costs)
5. ✅ **Correct Attribution:** Memories correctly attributed to creating user
---
## Configuration Guidance (Important!)
### ⚠️ Shared DEFAULT_USER_EMAIL Issue
**Problem:** Multiple users configured with same email → data shared (by design)
**❌ WRONG Configuration:**
```json
{
"env": {
"DEFAULT_USER_EMAIL": "team@company.com" // Shared across users
}
}
```
**✅ CORRECT Configuration:**
```json
{
"env": {
"DEFAULT_USER_EMAIL": "alice@company.com" // Unique per user
}
}
```
**Note:** This is a configuration issue, not a code vulnerability. Each user must have a unique email address.
---
## Release Recommendation
### ✅ **APPROVED FOR v1.7.0 RELEASE**
**Conditions:**
1. ✅ All four CVE fixes verified
2. ✅ Build succeeds
3. ✅ Security properties confirmed
4. 📝 Documentation update required (configuration guidance)
**Remaining Work (Non-Blocking):**
- Update DEPLOYMENT.md with configuration guidance
- Fix unrelated test infrastructure issues
- Address cosmetic linting warnings
---
## Full Report
See `/Users/masa/Projects/mcp-memory-ts/docs/testing/USER_ISOLATION_SECURITY_TEST_REPORT.md` for complete test report with:
- Detailed code verification
- Test evidence
- Performance analysis
- SQL injection testing
- Configuration examples
- Deployment readiness assessment
---
**Certified By:** QA Agent (Claude Code)
**Date:** 2025-10-13
**Status:** ✅ READY FOR PRODUCTION
