fix: Harden security middleware by logging detailed violations internally and returning generic error messages, and streamline user logging to use user_id.

src/logging.py

@@ -60,8 +60,6 @@ class JSONFormatter(logging.Formatter):
         # Add Context information if available
         if request_id:
             log_record["request_id"] = request_id
-        if role:
-            log_record["role"] = role
 
         # Add Error context if available
         if hasattr(record, "error_id"):

src/main.py

@@ -181,10 +181,8 @@ async def db_session_middleware(request: Request, call_next):
                 set_role(role)
 
         user_info_str = ""
-        if username:
+        if user_id:
-            user_info_str = f" | User: {username}"
+            user_info_str = f" | User ID: {user_id}"
-        if role:
-            user_info_str += f" ({role})"
 
         error_id = getattr(request.state, "error_id", None)
         log_msg = f"HTTP {request.method} {request.url.path} completed in {round(process_time, 2)}ms{user_info_str}"
@@ -199,7 +197,6 @@ async def db_session_middleware(request: Request, call_next):
                 "status_code": response.status_code,
                 "duration_ms": round(process_time, 2),
                 "user_id": user_id,
-                "role": role,
                 "error_id": error_id,
             },
         )

src/middleware.py

@@ -103,6 +103,7 @@ ALLOWED_HEADERS = {
     "x-forwarded-path",
     "x-forwarded-prefix",
     "cookie",
+    "x-kong-request-id"
 }
 
 MAX_QUERY_PARAMS = 50
@@ -193,33 +194,38 @@ def inspect_value(value: str, source: str):
     
 
     if XSS_PATTERN.search(value):
+        log.warning(f"Security violation: Potential XSS payload detected in {source}, value: {value}")
         raise HTTPException(
             status_code=422,
-            detail=f"Potential XSS payload detected in {source}",
+            detail="Invalid request parameters",
         )
 
     if SQLI_PATTERN.search(value):
+        log.warning(f"Security violation: Potential SQL injection payload detected in {source}, value: {value}")
         raise HTTPException(
             status_code=422,
-            detail=f"Potential SQL injection payload detected in {source}",
+            detail="Invalid request parameters",
         )
 
     if RCE_PATTERN.search(value):
+        log.warning(f"Security violation: Potential RCE payload detected in {source}, value: {value}")
         raise HTTPException(
             status_code=422,
-            detail=f"Potential RCE payload detected in {source}",
+            detail="Invalid request parameters",
         )
 
     if TRAVERSAL_PATTERN.search(value):
+        log.warning(f"Security violation: Potential Path Traversal payload detected in {source}, value: {value}")
         raise HTTPException(
             status_code=422,
-            detail=f"Potential Path Traversal payload detected in {source}",
+            detail="Invalid request parameters",
         )
 
     if has_control_chars(value):
+        log.warning(f"Security violation: Invalid control characters detected in {source}")
         raise HTTPException(
             status_code=422,
-            detail=f"Invalid control characters detected in {source}",
+            detail="Invalid request parameters",
         )
 
 
@@ -227,15 +233,17 @@ def inspect_json(obj, path="body", check_whitelist=True):
     if isinstance(obj, dict):
         for key, value in obj.items():
             if key in FORBIDDEN_JSON_KEYS:
+                log.warning(f"Security violation: Forbidden JSON key detected: {path}.{key}")
                 raise HTTPException(
                     status_code=422,
-                    detail=f"Forbidden JSON key detected: {path}.{key}",
+                    detail="Invalid request parameters",
                 )
             
             if check_whitelist and key not in ALLOWED_DATA_PARAMS:
+                log.warning(f"Security violation: Unknown JSON key detected: {path}.{key}")
                 raise HTTPException(
                     status_code=422,
-                    detail=f"Unknown JSON key detected: {path}.{key}",
+                    detail="Invalid request parameters",
                 )
             
             # Recurse. If the key is a dynamic container, we stop whitelist checking for children.
@@ -266,9 +274,10 @@ class RequestValidationMiddleware(BaseHTTPMiddleware):
         ALLOW_DUPLICATE_HEADERS = {'accept', 'accept-encoding', 'accept-language', 'accept-charset', 'cookie'}
         real_duplicates = [h for h in duplicate_headers if h not in ALLOW_DUPLICATE_HEADERS]
         if real_duplicates:
+            log.warning(f"Security violation: Duplicate headers detected: {real_duplicates}")
             raise HTTPException(
                 status_code=422,
-                detail=f"Duplicate headers are not allowed: {real_duplicates}",
+                detail="Invalid request parameters",
             )
             
         # Whitelist headers
@@ -276,9 +285,10 @@ class RequestValidationMiddleware(BaseHTTPMiddleware):
         if unknown_headers:
              filtered_unknown = [h for h in unknown_headers if not h.startswith('sec-')]
              if filtered_unknown:
+                log.warning(f"Security violation: Unknown headers detected: {filtered_unknown}")
                 raise HTTPException(
                     status_code=422,
-                    detail=f"Unknown headers detected: {filtered_unknown}",
+                    detail="Invalid request parameters",
                 )
              
         # Inspect header values
@@ -290,25 +300,28 @@ class RequestValidationMiddleware(BaseHTTPMiddleware):
         # 1. Query string limits
         # -------------------------
         if len(request.url.query) > MAX_QUERY_LENGTH:
+            log.warning(f"Security violation: Query string too long")
             raise HTTPException(
                 status_code=422,
-                detail="Query string too long",
+                detail="Invalid request parameters",
             )
 
         params = request.query_params.multi_items()
 
         if len(params) > MAX_QUERY_PARAMS:
+            log.warning(f"Security violation: Too many query parameters")
             raise HTTPException(
                 status_code=422,
-                detail="Too many query parameters",
+                detail="Invalid request parameters",
             )
 
         # Check for unknown query parameters
         unknown_params = [key for key, _ in params if key not in ALLOWED_DATA_PARAMS]
         if unknown_params:
+            log.warning(f"Security violation: Unknown query parameters detected: {unknown_params}")
             raise HTTPException(
                 status_code=422,
-                detail=f"Unknown query parameters detected: {unknown_params}",
+                detail="Invalid request parameters",
             )
 
         # -------------------------
@@ -321,9 +334,10 @@ class RequestValidationMiddleware(BaseHTTPMiddleware):
         ]
 
         if duplicates:
+            log.warning(f"Security violation: Duplicate query parameters detected: {duplicates}")
             raise HTTPException(
                 status_code=422,
-                detail=f"Duplicate query parameters are not allowed: {duplicates}",
+                detail="Invalid request parameters",
             )
 
         # -------------------------
@@ -338,19 +352,22 @@ class RequestValidationMiddleware(BaseHTTPMiddleware):
                 try:
                     size_val = int(value)
                     if size_val > 50:
+                        log.warning(f"Security violation: Pagination size too large ({size_val})")
                         raise HTTPException(
                             status_code=422,
-                            detail=f"Pagination size '{key}' cannot exceed 50",
+                            detail="Invalid request parameters",
                         )
                     if size_val % 5 != 0:
+                        log.warning(f"Security violation: Pagination size not multiple of 5 ({size_val})")
                         raise HTTPException(
                             status_code=422,
-                            detail=f"Pagination size '{key}' must be a multiple of 5",
+                            detail="Invalid request parameters",
                         )
                 except ValueError:
+                    log.warning(f"Security violation: Pagination size invalid value")
                     raise HTTPException(
                         status_code=422,
-                        detail=f"Pagination size '{key}' must be an integer",
+                        detail="Invalid request parameters",
                     )
 
         # -------------------------
@@ -361,7 +378,8 @@ class RequestValidationMiddleware(BaseHTTPMiddleware):
             content_type.startswith(t)
             for t in ("application/json", "multipart/form-data", "application/x-www-form-urlencoded")
         ):
-            raise HTTPException(status_code=422, detail="Unsupported Content-Type")
+            log.warning(f"Security violation: Unsupported Content-Type: {content_type}")
+            raise HTTPException(status_code=422, detail="Invalid request parameters")
 
         # -------------------------
         # 5. Single source check (Query vs JSON Body)
@@ -377,9 +395,10 @@ class RequestValidationMiddleware(BaseHTTPMiddleware):
                 has_body = True
                 
         if has_query and has_body:
+            log.warning(f"Security violation: Mixed parameters (query + JSON body)")
             raise HTTPException(
                 status_code=422,
-                detail="Parameters must be from a single source (query string or JSON body), mixed sources are not allowed",
+                detail="Invalid request parameters",
             )
 
         # -------------------------
@@ -394,7 +413,8 @@ class RequestValidationMiddleware(BaseHTTPMiddleware):
                 try:
                     payload = json.loads(body)
                 except json.JSONDecodeError:
-                    raise HTTPException(status_code=422, detail="Invalid JSON body")
+                    log.warning(f"Security violation: Invalid JSON body")
+                    raise HTTPException(status_code=422, detail="Invalid request parameters")
 
                 inspect_json(payload)