Check the value of abbreviationLen

right/src/config_parser/parse_config.h

@@ -19,6 +19,7 @@
         ParserError_InvalidSerializedSwitchKeymapAction,
         ParserError_InvalidModuleConfigurationCount,
         ParserError_InvalidKeymapCount,
+        ParserError_InvalidAbbreviationLen,
     } parser_error_t;
 
 // Functions:

right/src/config_parser/parse_keymap.c

@@ -205,6 +205,9 @@ parser_error_t ParseKeymap(config_buffer_t *buffer, uint8_t keymapIdx, uint8_t k
 
     (void)name;
     (void)description;
+    if (!abbreviationLen || abbreviationLen > 3) {
+        return ParserError_InvalidAbbreviationLen;
+    }
     if (layerCount != LAYER_COUNT) {
         return ParserError_InvalidLayerCount;
     }